diff --git a/dlls/ole32/clipboard.c b/dlls/ole32/clipboard.c
index 2cc1cfa191e..e3c93c95533 100644
--- a/dlls/ole32/clipboard.c
+++ b/dlls/ole32/clipboard.c
@@ -2040,10 +2040,12 @@ static LRESULT CALLBACK clipbrd_wndproc(HWND hwnd, UINT message, WPARAM wparam,
     case WM_RENDERALLFORMATS:
     {
         DWORD i;
-        ole_priv_data_entry *entries = clipbrd->cached_enum->entries;
+        ole_priv_data_entry *entries;
 
         TRACE("(): WM_RENDERALLFORMATS\n");
 
+        if (!clipbrd || !clipbrd->cached_enum) break;
+        entries = clipbrd->cached_enum->entries;
         for(i = 0; i < clipbrd->cached_enum->count; i++)
         {
             if(entries[i].first_use)