--- a/mailnews/mapi/mapihook/src/msgMapiImp.cpp
+++ b/mailnews/mapi/mapihook/src/msgMapiImp.cpp
@@ -331,17 +331,17 @@ protected:
   nsCOMPtr <nsISimpleEnumerator> m_msgEnumerator;
 };
 
 
 LONG CMapiImp::InitContext(unsigned long session, MsgMapiListContext **listContext)
 {
   nsMAPIConfiguration * pMapiConfig = nsMAPIConfiguration::GetMAPIConfiguration() ;
   if (!pMapiConfig)
-    return NS_ERROR_FAILURE ;  // get the singelton obj
+    return MAPI_E_FAILURE ;  // get the singelton obj
   *listContext = (MsgMapiListContext *) pMapiConfig->GetMapiListContext(session);
   // This is the first message
   if (!*listContext)
   {
     nsCOMPtr <nsIMsgFolder> inboxFolder;
     nsresult rv = GetDefaultInbox(getter_AddRefs(inboxFolder));
     if (NS_FAILED(rv))
     {
@@ -377,17 +377,17 @@ STDMETHODIMP CMapiImp::FindNext(unsigned
   // and we should start the enumeration operation.
   //
 
   *lpszMessageID = '\0';
   nsMAPIConfiguration * pMapiConfig = nsMAPIConfiguration::GetMAPIConfiguration() ;
   if (!pMapiConfig) 
   {
     NS_ASSERTION(false, "failed to get config in findnext");
-    return NS_ERROR_FAILURE ;  // get the singelton obj
+    return MAPI_E_FAILURE ;  // get the singelton obj
   }
   MsgMapiListContext *listContext;
   LONG ret = InitContext(aSession, &listContext);
   if (ret != SUCCESS_SUCCESS)
   {
     NS_ASSERTION(false, "init context failed");
     return ret;
   }