Index: win32ss/user/user32/windows/menu.c
===================================================================
--- win32ss/user/user32/windows/menu.c	(revision 62533)
+++ win32ss/user/user32/windows/menu.c	(working copy)
@@ -4266,9 +4266,11 @@
   ROSMENUINFO mi;
   BOOL res = FALSE;
 
-  if(!lpcmi || (lpcmi->cbSize != sizeof(MENUINFO)))
-    return FALSE;
-
+  if(!hmenu ||!lpcmi || (lpcmi->cbSize != sizeof(MENUINFO)))
+    {   
+        SetLastError(ERROR_INVALID_PARAMETER);
+        return FALSE;
+    }
   RtlZeroMemory(&mi, sizeof(MENUINFO));
   mi.cbSize = sizeof(MENUINFO);
   mi.fMask = lpcmi->fMask;