Index: d_ary_heap.hpp
===================================================================
--- d_ary_heap.hpp	(revision 65)
+++ d_ary_heap.hpp	(working copy)
@@ -18,6 +18,7 @@
 #include <boost/assert.hpp>
 #include <boost/static_assert.hpp>
 #include <boost/shared_array.hpp>
+#include <boost/type_traits.hpp>
 #include <boost/property_map/property_map.hpp>
 
 namespace boost {
@@ -90,7 +91,7 @@
     BOOST_STATIC_ASSERT (Arity >= 2);
 
     public:
-    typedef typename Container::size_type size_type;
+    typedef typename remove_reference<Container>::type::size_type size_type;
     typedef Value value_type;
     typedef typename boost::property_traits<DistanceMap>::value_type key_type;
     typedef DistanceMap key_map;