diff --git a/lemon/grid_graph.h b/lemon/grid_graph.h
--- a/lemon/grid_graph.h
+++ b/lemon/grid_graph.h
@@ -499,10 +499,10 @@
   /// This graph type fully conforms to the \ref concepts::Graph
   /// "Graph concept".
   class GridGraph : public ExtendedGridGraphBase {
+    typedef ExtendedGridGraphBase Parent;
+
   public:
 
-    typedef ExtendedGridGraphBase Parent;
-
     /// \brief Map to get the indices of the nodes as dim2::Point<int>.
     ///
     /// Map to get the indices of the nodes as dim2::Point<int>.