diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index 60f08b91c..148f0abe8 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -2077,7 +2077,7 @@ UniValue walletpassphrase(const JSONRPCRequest& request)
 
     int64_t nSleepTime = request.params[1].get_int64();
     pwallet->nRelockTime = GetTime() + nSleepTime;
-    RPCRunLater(strprintf("lockwallet_%u", uintptr_t(pwallet)), boost::bind(LockWallet, pwallet), nSleepTime);
+    RPCRunLater(strprintf("lockwallet(%s)", pwallet->strWalletFile), boost::bind(LockWallet, pwallet), nSleepTime);
 
     return NullUniValue;
 }