1 files changed, 2 insertions, 1 deletions
diff --git a/src/test/fuzz/tx_pool.cpp b/src/test/fuzz/tx_pool.cpp
index 068e207118..ad11f2c5f2 100644
--- a/src/test/fuzz/tx_pool.cpp
+++ b/src/test/fuzz/tx_pool.cpp
@@ -21,8 +21,9 @@ std::vector<COutPoint> g_outpoints_coinbase_init_mature;
 std::vector<COutPoint> g_outpoints_coinbase_init_immature;
 
 struct MockedTxPool : public CTxMemPool {
-    void RollingFeeUpdate()
+    void RollingFeeUpdate() EXCLUSIVE_LOCKS_REQUIRED(!cs)
     {
+        LOCK(cs);
         lastRollingFeeUpdate = GetTime();
         blockSinceLastRollingFeeBump = true;
     }