diff --git a/include/boost/fusion/support/is_sequence.hpp b/include/boost/fusion/support/is_sequence.hpp
index 8b582104..6b9b2118 100644
--- a/include/boost/fusion/support/is_sequence.hpp
+++ b/include/boost/fusion/support/is_sequence.hpp
@@ -32,7 +32,7 @@ namespace boost { namespace fusion
         {
             template <typename Sequence>
             struct apply
-              : is_convertible<Sequence, detail::from_sequence_convertible_type>
+              : is_convertible<Sequence, fusion::detail::from_sequence_convertible_type>
             {};
         };
 
@@ -69,7 +69,7 @@ namespace boost { namespace fusion
 
         template <typename Sequence, typename Enable = void>
         struct is_native_fusion_sequence
-          : is_convertible<Sequence, detail::from_sequence_convertible_type>
+          : is_convertible<Sequence, fusion::detail::from_sequence_convertible_type>
         {};
     }
 }}