diff --git a/dlls/wintrust/wintrust_main.c b/dlls/wintrust/wintrust_main.c
index b7788b1..0603c65 100644
--- a/dlls/wintrust/wintrust_main.c
+++ b/dlls/wintrust/wintrust_main.c
@@ -150,8 +150,10 @@ static LONG WINTRUST_DefaultClose(HWND hwnd, GUID *actionID,
     TRACE("(%p, %s, %p)\n", hwnd, debugstr_guid(actionID), data);
 
     if (provData)
-    {
-        err = provData->psPfns->pfnCleanupPolicy(provData);
+    {   
+        if (provData->psPfns->pfnCleanupPolicy)
+            err = provData->psPfns->pfnCleanupPolicy(provData);
+
         WINTRUST_Free(provData->padwTrustStepErrors);
         WINTRUST_Free(provData->u.pPDSip);
         WINTRUST_Free(provData->psPfns);