diff --git a/src/libraries/turtle/format.hpp b/src/libraries/turtle/format.hpp
index f91ff99..dbb5602 100644
--- a/src/libraries/turtle/format.hpp
+++ b/src/libraries/turtle/format.hpp
@@ -41,7 +41,7 @@ namespace detail
     };
 
     template< typename T >
-    struct is_serializable : public boost::integral_constant< bool, is_serializable_impl< T >::value >
+    struct is_serializable : boost::integral_constant< bool, is_serializable_impl< T >::value >
     {};
 
     template< typename T >
diff --git a/src/libraries/turtle/is_functor.hpp b/src/libraries/turtle/is_functor.hpp
index 0b548c0..1c8e53e 100644
--- a/src/libraries/turtle/is_functor.hpp
+++ b/src/libraries/turtle/is_functor.hpp
@@ -36,7 +36,7 @@ namespace detail
     };
 
     template< typename T >
-    struct has_result_type : public boost::integral_constant< bool, has_result_type_impl< T >::value >
+    struct has_result_type : boost::integral_constant< bool, has_result_type_impl< T >::value >
     {
     };
 
@@ -53,7 +53,7 @@ namespace detail
     };
 
     template< typename T >
-    struct has_sig : public boost::integral_constant< bool, has_sig_impl< T >::value >
+    struct has_sig : boost::integral_constant< bool, has_sig_impl< T >::value >
     {
     };