diff --git a/toolkit/components/places/src/nsNavHistory.h b/toolkit/components/places/src/nsNavHistory.h
index 6d36ab053c4..8441655d545 100644
--- a/toolkit/components/places/src/nsNavHistory.h
+++ b/toolkit/components/places/src/nsNavHistory.h
@@ -117,10 +117,9 @@ public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSINAVHISTORYRESULTNODE
 
-private:
+protected:
   virtual ~nsNavHistoryResultNode() {}
 
-protected:
   // parent of this element, NULL if no parent. Filled in by FillAllElements
   // in the result set.
   nsNavHistoryResultNode* mParent;