diff --git a/reactos/lib/oledlg/insobjdlg.c b/reactos/lib/oledlg/insobjdlg.c
index 88259264ea1..04de4e6f5b5 100644
--- a/reactos/lib/oledlg/insobjdlg.c
+++ b/reactos/lib/oledlg/insobjdlg.c
@@ -333,7 +333,8 @@ static void UIINSERTOBJECTDLG_SelectCreateFromFile(InsertObjectDlgInfo* pdlgInfo
  */
 static BOOL UIINSERTOBJECTDLG_PopulateObjectTypes(InsertObjectDlgInfo* pdlgInfo)
 {
-  DWORD i, len;
+  DWORD i;
+  LONG len;
   HKEY hkclsids;
   HKEY hkey;
   CLSID clsid;