diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index e1501d7254b..bb668984e90 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -79,6 +79,7 @@ ChainstateManager& EnsureChainman(const std::any& context)
     if (!node.chainman) {
         throw JSONRPCError(RPC_INTERNAL_ERROR, "Node chainman not found");
     }
+    WITH_LOCK(::cs_main, CHECK_NONFATAL(std::addressof(g_chainman) == std::addressof(*node.chainman)));
     return *node.chainman;
 }