diff --git a/dlls/rpcrt4/tests/ndr_marshall.c b/dlls/rpcrt4/tests/ndr_marshall.c
index 2dfba129fb..15ccbefa9e 100644
--- a/dlls/rpcrt4/tests/ndr_marshall.c
+++ b/dlls/rpcrt4/tests/ndr_marshall.c
@@ -1879,6 +1879,7 @@ static void test_conf_complex_struct(void)
     StubMsg.pfnFree(mem);
 
     HeapFree(GetProcessHeap(), 0, StubMsg.RpcMsg->Buffer);
+    HeapFree(GetProcessHeap(), 0, memsrc);
 }
 
 static void test_ndr_buffer(void)