diff --git a/turtle/detail/signature.hpp b/turtle/detail/signature.hpp
index bc900e7..8a45c9f 100644
--- a/turtle/detail/signature.hpp
+++ b/turtle/detail/signature.hpp
@@ -43,19 +43,18 @@ namespace detail
     {
         typedef T base_type;
     };
-}
 
     // if an error is generated by the line below it means
     // the method is ambiguous : use MOCK_METHOD_EXT instead
     template< typename T >
     T& ambiguous_method_name_use_MOCK_METHOD_EXT_instead( const T& );
-
+}
 } // mock
 
 #define MOCK_SIGNATURE(M) \
     mock::detail::signature< \
         BOOST_TYPEOF( \
-            mock::ambiguous_method_name_use_MOCK_METHOD_EXT_instead( \
+            mock::detail::ambiguous_method_name_use_MOCK_METHOD_EXT_instead( \
                 &base_type::M ) ) \
     >::type