--- a/tools/qdoc3/mangenerator.h	Mon Jun 21 22:38:13 2010 +0100
+++ b/tools/qdoc3/mangenerator.h	Thu Jul 22 16:41:55 2010 +0100
@@ -63,7 +63,7 @@
 			      CodeMarker *marker );
     virtual void generateClassLikeNode(const InnerNode *node, CodeMarker *marker);
     virtual void generateFakeNode( const FakeNode *fake, CodeMarker *marker );
-    virtual QString fileExtension(const Node *node);
+    virtual QString fileExtension(const Node *node) const;
 
 private:
     void generateHeader( const QString& name );