diff --git a/include/boost/concept/detail/general.hpp b/include/boost/concept/detail/general.hpp
index e3014c1..c88a1ed 100644
--- a/include/boost/concept/detail/general.hpp
+++ b/include/boost/concept/detail/general.hpp
@@ -65,10 +65,19 @@ struct requirement_<void(*)(Model)>
   
 # endif
 
+// Version check from https://svn.boost.org/trac/boost/changeset/82886
+// (boost/static_assert.hpp)
+#if defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 7))) 
+#define BOOST_CONCEPT_UNUSED_TYPEDEF __attribute__((unused))
+#else
+#define BOOST_CONCEPT_UNUSED_TYPEDEF /**/
+#endif
+
 #  define BOOST_CONCEPT_ASSERT_FN( ModelFnPtr )             \
     typedef ::boost::concepts::detail::instantiate<          \
     &::boost::concepts::requirement_<ModelFnPtr>::failed>    \
-      BOOST_PP_CAT(boost_concept_check,__LINE__)
+      BOOST_PP_CAT(boost_concept_check,__LINE__)             \
+      BOOST_CONCEPT_UNUSED_TYPEDEF
 
 }}
 
diff --git a/include/boost/concept_check.hpp b/include/boost/concept_check.hpp
index 9cfd281..292f37d 100644
--- a/include/boost/concept_check.hpp
+++ b/include/boost/concept_check.hpp
@@ -878,7 +878,7 @@ namespace boost
           typename BackInsertionSequence::const_reference
               r = cc.back();
           ignore_unused_variable_warning(r);
-      };
+      }
       S c;
       typename S::value_type t;
   };