diff --git a/lemon/hypercube_graph.h b/lemon/hypercube_graph.h
--- a/lemon/hypercube_graph.h
+++ b/lemon/hypercube_graph.h
@@ -294,10 +294,10 @@
   /// This graph type fully conforms to the \ref concepts::Graph
   /// "Graph concept".
   class HypercubeGraph : public ExtendedHypercubeGraphBase {
+    typedef ExtendedHypercubeGraphBase Parent;
+
   public:
 
-    typedef ExtendedHypercubeGraphBase Parent;
-
     /// \brief Constructs a hypercube graph with \c dim dimensions.
     ///
     /// Constructs a hypercube graph with \c dim dimensions.