diff --git a/src/pool_block.cpp b/src/pool_block.cpp
index 0099870..2063be2 100644
--- a/src/pool_block.cpp
+++ b/src/pool_block.cpp
@@ -29,13 +29,7 @@ LOG_CATEGORY(PoolBlock)
 
 namespace p2pool {
 
-uv_rwlock_t PoolBlock::s_precalculatedSharesLock;
-
-static struct PrecalculatedLockInit
-{
-	FORCEINLINE PrecalculatedLockInit() { uv_rwlock_init(&PoolBlock::s_precalculatedSharesLock); }
-	FORCEINLINE ~PrecalculatedLockInit() { uv_rwlock_destroy(&PoolBlock::s_precalculatedSharesLock); }
-} precalculated_lock_init;
+ReadWriteLock PoolBlock::s_precalculatedSharesLock;
 
 PoolBlock::PoolBlock()
 	: m_majorVersion(0)
diff --git a/src/pool_block.h b/src/pool_block.h
index 44634f5..866382d 100644
--- a/src/pool_block.h
+++ b/src/pool_block.h
@@ -162,7 +162,7 @@ struct PoolBlock
 
 	bool m_precalculated;
 
-	static uv_rwlock_t s_precalculatedSharesLock;
+	static ReadWriteLock s_precalculatedSharesLock;
 	std::vector<MinerShare> m_precalculatedShares;
 
 	uint64_t m_localTimestamp;
diff --git a/src/uv_util.h b/src/uv_util.h
index 78d04ea..e699cc4 100644
--- a/src/uv_util.h
+++ b/src/uv_util.h
@@ -25,6 +25,16 @@ static_assert(sizeof(in_addr) == 4, "struct in_addr has invalid size");
 
 namespace p2pool {
 
+struct ReadWriteLock : public nocopy_nomove {
+	FORCEINLINE  ReadWriteLock() { uv_rwlock_init(&m_lock);    }
+	FORCEINLINE ~ReadWriteLock() { uv_rwlock_destroy(&m_lock); }
+
+	FORCEINLINE operator uv_rwlock_t&() { return m_lock; }
+
+private:
+	uv_rwlock_t m_lock;
+};
+
 struct MutexLock : public nocopy_nomove
 {
 	explicit FORCEINLINE MutexLock(uv_mutex_t& handle) : m_handle(&handle) { uv_mutex_lock(&handle); }