--- mutable_heap.hpp	2014-04-01 13:53:11.862058174 +0200
+++ mutable_heap2.hpp	2014-04-01 13:49:03.226054000 +0200
@@ -407,7 +407,7 @@
      * */
     void increase(handle_type handle, const_reference v)
     {
-        BOOST_ASSERT(!value_compare()(v, handle.iterator->first));
+        BOOST_ASSERT(!static_cast<const value_compare &>(q_.value_comp())(v, handle.iterator->first));
         handle.iterator->first = v;
         increase(handle);
     }
@@ -435,7 +435,7 @@
      * */
     void decrease(handle_type handle, const_reference v)
     {
-        BOOST_ASSERT(!value_compare()(handle.iterator->first, v));
+        BOOST_ASSERT(!static_cast<const value_compare &>(q_.value_comp())(handle.iterator->first, v));
         handle.iterator->first = v;
         decrease(handle);
     }