diff --git a/src/cryptonote_basic/miner.cpp b/src/cryptonote_basic/miner.cpp
index cf0e582b6..258e782a2 100644
--- a/src/cryptonote_basic/miner.cpp
+++ b/src/cryptonote_basic/miner.cpp
@@ -171,9 +171,10 @@ namespace cryptonote
       extra_nonce = m_extra_messages[m_config.current_extra_message_index];
     }
 
+    uint64_t cumulative_weight;
     uint64_t seed_height;
     crypto::hash seed_hash;
-    if(!m_phandler->get_block_template(bl, m_mine_address, di, height, expected_reward, extra_nonce, seed_height, seed_hash))
+    if(!m_phandler->get_block_template(bl, m_mine_address, di, height, expected_reward, cumulative_weight, extra_nonce, seed_height, seed_hash))
     {
       LOG_ERROR("Failed to get_block_template(), stopping mining");
       return false;
diff --git a/src/cryptonote_basic/miner.h b/src/cryptonote_basic/miner.h
index c02321f38..0a61606b3 100644
--- a/src/cryptonote_basic/miner.h
+++ b/src/cryptonote_basic/miner.h
@@ -47,7 +47,7 @@ namespace cryptonote
   struct i_miner_handler
   {
     virtual bool handle_block_found(block& b, block_verification_context &bvc) = 0;
-    virtual bool get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash) = 0;
+    virtual bool get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, uint64_t &cumulative_weight, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash) = 0;
   protected:
     ~i_miner_handler(){};
   };
diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 2adbc3944..13c470172 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -1544,7 +1544,7 @@ uint64_t Blockchain::get_current_cumulative_block_weight_median() const
 // in a lot of places.  That flag is not referenced in any of the code
 // nor any of the makefiles, howeve.  Need to look into whether or not it's
 // necessary at all.
-bool Blockchain::create_block_template(block& b, const crypto::hash *from_block, const account_public_address& miner_address, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash)
+bool Blockchain::create_block_template(block& b, const crypto::hash *from_block, const account_public_address& miner_address, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, uint64_t& cumulative_weight, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash)
 {
   LOG_PRINT_L3("Blockchain::" << __func__);
   size_t median_weight;
@@ -1571,6 +1571,7 @@ bool Blockchain::create_block_template(block& b, const crypto::hash *from_block,
       diffic = m_btc_difficulty;
       height = m_btc_height;
       expected_reward = m_btc_expected_reward;
+      cumulative_weight = m_btc_cumulative_weight;
       seed_height = m_btc_seed_height;
       seed_hash = m_btc_seed_hash;
       return true;
@@ -1754,7 +1755,7 @@ bool Blockchain::create_block_template(block& b, const crypto::hash *from_block,
   size_t max_outs = hf_version >= 4 ? 1 : 11;
   bool r = construct_miner_tx(height, median_weight, already_generated_coins, txs_weight, fee, miner_address, b.miner_tx, ex_nonce, max_outs, hf_version);
   CHECK_AND_ASSERT_MES(r, false, "Failed to construct miner tx, first chance");
-  size_t cumulative_weight = txs_weight + get_transaction_weight(b.miner_tx);
+  cumulative_weight = txs_weight + get_transaction_weight(b.miner_tx);
 #if defined(DEBUG_CREATE_BLOCK_TEMPLATE)
   MDEBUG("Creating block template: miner tx weight " << get_transaction_weight(b.miner_tx) <<
       ", cumulative weight " << cumulative_weight);
@@ -1806,16 +1807,16 @@ bool Blockchain::create_block_template(block& b, const crypto::hash *from_block,
 #endif
 
     if (!from_block)
-      cache_block_template(b, miner_address, ex_nonce, diffic, height, expected_reward, seed_height, seed_hash, pool_cookie);
+      cache_block_template(b, miner_address, ex_nonce, diffic, height, expected_reward, cumulative_weight, seed_height, seed_hash, pool_cookie);
     return true;
   }
   LOG_ERROR("Failed to create_block_template with " << 10 << " tries");
   return false;
 }
 //------------------------------------------------------------------
-bool Blockchain::create_block_template(block& b, const account_public_address& miner_address, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash)
+bool Blockchain::create_block_template(block& b, const account_public_address& miner_address, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, uint64_t& cumulative_weight, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash)
 {
-  return create_block_template(b, NULL, miner_address, diffic, height, expected_reward, ex_nonce, seed_height, seed_hash);
+  return create_block_template(b, NULL, miner_address, diffic, height, expected_reward, cumulative_weight, ex_nonce, seed_height, seed_hash);
 }
 //------------------------------------------------------------------
 bool Blockchain::get_miner_data(uint8_t& major_version, uint64_t& height, crypto::hash& prev_id, crypto::hash& seed_hash, difficulty_type& difficulty, uint64_t& median_weight, uint64_t& already_generated_coins, std::vector<tx_block_template_backlog_entry>& tx_backlog)
@@ -5607,7 +5608,7 @@ void Blockchain::invalidate_block_template_cache()
   m_btc_valid = false;
 }
 
-void Blockchain::cache_block_template(const block &b, const cryptonote::account_public_address &address, const blobdata &nonce, const difficulty_type &diff, uint64_t height, uint64_t expected_reward, uint64_t seed_height, const crypto::hash &seed_hash, uint64_t pool_cookie)
+void Blockchain::cache_block_template(const block &b, const cryptonote::account_public_address &address, const blobdata &nonce, const difficulty_type &diff, uint64_t height, uint64_t expected_reward, uint64_t cumulative_weight, uint64_t seed_height, const crypto::hash &seed_hash, uint64_t pool_cookie)
 {
   MDEBUG("Setting block template cache");
   m_btc = b;
@@ -5616,6 +5617,7 @@ void Blockchain::cache_block_template(const block &b, const cryptonote::account_
   m_btc_difficulty = diff;
   m_btc_height = height;
   m_btc_expected_reward = expected_reward;
+  m_btc_cumulative_weight = cumulative_weight;
   m_btc_seed_hash = seed_hash;
   m_btc_seed_height = seed_height;
   m_btc_pool_cookie = pool_cookie;
diff --git a/src/cryptonote_core/blockchain.h b/src/cryptonote_core/blockchain.h
index 503ea92dd..2caad16a5 100644
--- a/src/cryptonote_core/blockchain.h
+++ b/src/cryptonote_core/blockchain.h
@@ -371,8 +371,8 @@ namespace cryptonote
      *
      * @return true if block template filled in successfully, else false
      */
-    bool create_block_template(block& b, const account_public_address& miner_address, difficulty_type& di, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash);
-    bool create_block_template(block& b, const crypto::hash *from_block, const account_public_address& miner_address, difficulty_type& di, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash);
+    bool create_block_template(block& b, const account_public_address& miner_address, difficulty_type& di, uint64_t& height, uint64_t& expected_reward, uint64_t& cumulative_weight, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash);
+    bool create_block_template(block& b, const crypto::hash *from_block, const account_public_address& miner_address, difficulty_type& di, uint64_t& height, uint64_t& expected_reward, uint64_t& cumulative_weight, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash);
 
     /**
      * @brief gets data required to create a block template and start mining on it
@@ -1202,6 +1202,7 @@ namespace cryptonote
     uint64_t m_btc_height;
     uint64_t m_btc_pool_cookie;
     uint64_t m_btc_expected_reward;
+    uint64_t m_btc_cumulative_weight;
     crypto::hash m_btc_seed_hash;
     uint64_t m_btc_seed_height;
     bool m_btc_valid;
@@ -1594,7 +1595,7 @@ namespace cryptonote
      *
      * At some point, may be used to push an update to miners
      */
-    void cache_block_template(const block &b, const cryptonote::account_public_address &address, const blobdata &nonce, const difficulty_type &diff, uint64_t height, uint64_t expected_reward, uint64_t seed_height, const crypto::hash &seed_hash, uint64_t pool_cookie);
+    void cache_block_template(const block &b, const cryptonote::account_public_address &address, const blobdata &nonce, const difficulty_type &diff, uint64_t height, uint64_t expected_reward, uint64_t cumulative_weight, uint64_t seed_height, const crypto::hash &seed_hash, uint64_t pool_cookie);
 
     /**
      * @brief sends new block notifications to ZMQ `miner_data` subscribers
diff --git a/src/cryptonote_core/cryptonote_core.cpp b/src/cryptonote_core/cryptonote_core.cpp
index 08c72573b..954dc81e4 100644
--- a/src/cryptonote_core/cryptonote_core.cpp
+++ b/src/cryptonote_core/cryptonote_core.cpp
@@ -1468,14 +1468,14 @@ namespace cryptonote
       notify_txpool_event(tx_blobs, epee::to_span(tx_hashes), epee::to_span(txs), just_broadcasted);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash)
+  bool core::get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, uint64_t& cumulative_weight, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash)
   {
-    return m_blockchain_storage.create_block_template(b, adr, diffic, height, expected_reward, ex_nonce, seed_height, seed_hash);
+    return m_blockchain_storage.create_block_template(b, adr, diffic, height, expected_reward, cumulative_weight, ex_nonce, seed_height, seed_hash);
   }
   //-----------------------------------------------------------------------------------------------
-  bool core::get_block_template(block& b, const crypto::hash *prev_block, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash)
+  bool core::get_block_template(block& b, const crypto::hash *prev_block, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, uint64_t& cumulative_weight, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash)
   {
-    return m_blockchain_storage.create_block_template(b, prev_block, adr, diffic, height, expected_reward, ex_nonce, seed_height, seed_hash);
+    return m_blockchain_storage.create_block_template(b, prev_block, adr, diffic, height, expected_reward, cumulative_weight, ex_nonce, seed_height, seed_hash);
   }
   //-----------------------------------------------------------------------------------------------
   bool core::get_miner_data(uint8_t& major_version, uint64_t& height, crypto::hash& prev_id, crypto::hash& seed_hash, difficulty_type& difficulty, uint64_t& median_weight, uint64_t& already_generated_coins, std::vector<tx_block_template_backlog_entry>& tx_backlog)
diff --git a/src/cryptonote_core/cryptonote_core.h b/src/cryptonote_core/cryptonote_core.h
index 77a5d4beb..2ecb88690 100644
--- a/src/cryptonote_core/cryptonote_core.h
+++ b/src/cryptonote_core/cryptonote_core.h
@@ -231,8 +231,8 @@ namespace cryptonote
       *
       * @note see Blockchain::create_block_template
       */
-     virtual bool get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash) override;
-     virtual bool get_block_template(block& b, const crypto::hash *prev_block, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash);
+     virtual bool get_block_template(block& b, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, uint64_t &cumulative_weight, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash) override;
+     virtual bool get_block_template(block& b, const crypto::hash *prev_block, const account_public_address& adr, difficulty_type& diffic, uint64_t& height, uint64_t& expected_reward, uint64_t &cumulative_weight, const blobdata& ex_nonce, uint64_t &seed_height, crypto::hash &seed_hash);
 
      /**
       * @copydoc Blockchain::get_miner_data
diff --git a/src/rpc/core_rpc_server.cpp b/src/rpc/core_rpc_server.cpp
index 7fcd1e6d7..f9afa4021 100644
--- a/src/rpc/core_rpc_server.cpp
+++ b/src/rpc/core_rpc_server.cpp
@@ -1856,10 +1856,10 @@ namespace cryptonote
     return 0;
   }
   //------------------------------------------------------------------------------------------------------------------------------
-  bool core_rpc_server::get_block_template(const account_public_address &address, const crypto::hash *prev_block, const cryptonote::blobdata &extra_nonce, size_t &reserved_offset, cryptonote::difficulty_type  &difficulty, uint64_t &height, uint64_t &expected_reward, block &b, uint64_t &seed_height, crypto::hash &seed_hash, crypto::hash &next_seed_hash, epee::json_rpc::error &error_resp)
+  bool core_rpc_server::get_block_template(const account_public_address &address, const crypto::hash *prev_block, const cryptonote::blobdata &extra_nonce, size_t &reserved_offset, cryptonote::difficulty_type  &difficulty, uint64_t &height, uint64_t &expected_reward, uint64_t& cumulative_weight, block &b, uint64_t &seed_height, crypto::hash &seed_hash, crypto::hash &next_seed_hash, epee::json_rpc::error &error_resp)
   {
     b = boost::value_initialized<cryptonote::block>();
-    if(!m_core.get_block_template(b, prev_block, address, difficulty, height, expected_reward, extra_nonce, seed_height, seed_hash))
+    if(!m_core.get_block_template(b, prev_block, address, difficulty, height, expected_reward, cumulative_weight, extra_nonce, seed_height, seed_hash))
     {
       error_resp.code = CORE_RPC_ERROR_CODE_INTERNAL_ERROR;
       error_resp.message = "Internal error: failed to create block template";
@@ -1984,7 +1984,7 @@ namespace cryptonote
       }
     }
     crypto::hash seed_hash, next_seed_hash;
-    if (!get_block_template(info.address, req.prev_block.empty() ? NULL : &prev_block, blob_reserve, reserved_offset, wdiff, res.height, res.expected_reward, b, res.seed_height, seed_hash, next_seed_hash, error_resp))
+    if (!get_block_template(info.address, req.prev_block.empty() ? NULL : &prev_block, blob_reserve, reserved_offset, wdiff, res.height, res.expected_reward, res.cumulative_weight, b, res.seed_height, seed_hash, next_seed_hash, error_resp))
       return false;
     if (b.major_version >= RX_BLOCK_VERSION)
     {
@@ -3520,9 +3520,9 @@ namespace cryptonote
     crypto::hash seed_hash, next_seed_hash;
     if (!m_rpc_payment->get_info(client, [&](const cryptonote::blobdata &extra_nonce, cryptonote::block &b, uint64_t &seed_height, crypto::hash &seed_hash)->bool{
       cryptonote::difficulty_type difficulty;
-      uint64_t height, expected_reward;
+      uint64_t height, expected_reward, cumulative_weight;
       size_t reserved_offset;
-      if (!get_block_template(m_rpc_payment->get_payment_address(), NULL, extra_nonce, reserved_offset, difficulty, height, expected_reward, b, seed_height, seed_hash, next_seed_hash, error_resp))
+      if (!get_block_template(m_rpc_payment->get_payment_address(), NULL, extra_nonce, reserved_offset, difficulty, height, expected_reward, cumulative_weight, b, seed_height, seed_hash, next_seed_hash, error_resp))
         return false;
       return true;
     }, hashing_blob, res.seed_height, seed_hash, top_hash, res.diff, res.credits_per_hash_found, res.credits, res.cookie))
diff --git a/src/rpc/core_rpc_server.h b/src/rpc/core_rpc_server.h
index a80b977c2..6bd0fc25b 100644
--- a/src/rpc/core_rpc_server.h
+++ b/src/rpc/core_rpc_server.h
@@ -285,7 +285,7 @@ private:
     enum invoke_http_mode { JON, BIN, JON_RPC };
     template <typename COMMAND_TYPE>
     bool use_bootstrap_daemon_if_necessary(const invoke_http_mode &mode, const std::string &command_name, const typename COMMAND_TYPE::request& req, typename COMMAND_TYPE::response& res, bool &r);
-    bool get_block_template(const account_public_address &address, const crypto::hash *prev_block, const cryptonote::blobdata &extra_nonce, size_t &reserved_offset, cryptonote::difficulty_type &difficulty, uint64_t &height, uint64_t &expected_reward, block &b, uint64_t &seed_height, crypto::hash &seed_hash, crypto::hash &next_seed_hash, epee::json_rpc::error &error_resp);
+    bool get_block_template(const account_public_address &address, const crypto::hash *prev_block, const cryptonote::blobdata &extra_nonce, size_t &reserved_offset, cryptonote::difficulty_type &difficulty, uint64_t &height, uint64_t &expected_reward, uint64_t& cumulative_weight, block &b, uint64_t &seed_height, crypto::hash &seed_hash, crypto::hash &next_seed_hash, epee::json_rpc::error &error_resp);
     bool check_payment(const std::string &client, uint64_t payment, const std::string &rpc, bool same_ts, std::string &message, uint64_t &credits, std::string &top_hash);
     
     core& m_core;
diff --git a/src/rpc/core_rpc_server_commands_defs.h b/src/rpc/core_rpc_server_commands_defs.h
index afe090d28..618bf107e 100644
--- a/src/rpc/core_rpc_server_commands_defs.h
+++ b/src/rpc/core_rpc_server_commands_defs.h
@@ -101,7 +101,7 @@ inline const std::string get_rpc_status(const bool trusted_daemon, const std::st
 // advance which version they will stop working with
 // Don't go over 32767 for any of these
 #define CORE_RPC_VERSION_MAJOR 3
-#define CORE_RPC_VERSION_MINOR 15
+#define CORE_RPC_VERSION_MINOR 16
 #define MAKE_CORE_RPC_VERSION(major,minor) (((major)<<16)|(minor))
 #define CORE_RPC_VERSION MAKE_CORE_RPC_VERSION(CORE_RPC_VERSION_MAJOR, CORE_RPC_VERSION_MINOR)
 
@@ -984,6 +984,7 @@ inline const std::string get_rpc_status(const bool trusted_daemon, const std::st
       uint64_t height;
       uint64_t reserved_offset;
       uint64_t expected_reward;
+      uint64_t cumulative_weight;
       std::string prev_hash;
       uint64_t seed_height;
       std::string seed_hash;
@@ -999,6 +1000,7 @@ inline const std::string get_rpc_status(const bool trusted_daemon, const std::st
         KV_SERIALIZE(height)
         KV_SERIALIZE(reserved_offset)
         KV_SERIALIZE(expected_reward)
+        KV_SERIALIZE_OPT(cumulative_weight, static_cast<uint64_t>(0))
         KV_SERIALIZE(prev_hash)
         KV_SERIALIZE(seed_height)
         KV_SERIALIZE(blocktemplate_blob)
diff --git a/tests/functional_tests/blockchain.py b/tests/functional_tests/blockchain.py
index 7cf3a6420..db0bd2eef 100755
--- a/tests/functional_tests/blockchain.py
+++ b/tests/functional_tests/blockchain.py
@@ -137,6 +137,7 @@ class BlockchainTest():
         assert res_getblocktemplate.reserved_offset > 0
         assert res_getblocktemplate.prev_hash == res_info.top_block_hash
         assert res_getblocktemplate.expected_reward >= 600000000000
+        assert res_getblocktemplate.cumulative_weight > 0
         assert len(res_getblocktemplate.blocktemplate_blob) > 0
         assert len(res_getblocktemplate.blockhashing_blob) > 0
         assert int(res_getblocktemplate.wide_difficulty, 16) == (res_getblocktemplate.difficulty_top64 << 64) + res_getblocktemplate.difficulty