diff --git a/src/p2pool.cpp b/src/p2pool.cpp
index 9399790..8850594 100644
--- a/src/p2pool.cpp
+++ b/src/p2pool.cpp
@@ -1552,13 +1552,15 @@ void p2pool::api_update_network_stats()
 	}
 
 	m_api->set(p2pool_api::Category::NETWORK, "stats",
-		[mainnet_tip](log::Stream& s)
+		[this, mainnet_tip](log::Stream& s)
 		{
 			s << "{\"difficulty\":" << mainnet_tip.difficulty
 				<< ",\"hash\":\"" << mainnet_tip.id
 				<< "\",\"height\":" << mainnet_tip.height
 				<< ",\"reward\":" << mainnet_tip.reward
-				<< ",\"timestamp\":" << mainnet_tip.timestamp << "}";
+				<< ",\"timestamp\":" << mainnet_tip.timestamp
+				<< ",\"zmq_last_active\":" << zmq_last_active()
+				<< "}";
 		});
 
 	api_update_stats_mod();