diff --git a/include/boost/iterator/iterator_facade.hpp b/include/boost/iterator/iterator_facade.hpp
index 9696b50..5ee73b5 100644
--- a/include/boost/iterator/iterator_facade.hpp
+++ b/include/boost/iterator/iterator_facade.hpp
@@ -324,7 +324,7 @@ namespace boost
 
         static type make(Reference x)
         {
-            return implicit_cast<type>(&x);
+            return boost::implicit_cast<type>(&x);
         }
     };