diff --git a/turtle/detail/signature.hpp b/turtle/detail/signature.hpp
index 8a45c9f..2f7985d 100644
--- a/turtle/detail/signature.hpp
+++ b/turtle/detail/signature.hpp
@@ -45,16 +45,17 @@ namespace detail
     };
 
     // if an error is generated by the line below it means
-    // the method is ambiguous : use MOCK_METHOD_EXT instead
+    // the method is ambiguous : specify its signature to
+    // disambiguate
     template< typename T >
-    T& ambiguous_method_name_use_MOCK_METHOD_EXT_instead( const T& );
+    T& ambiguous_method_requires_to_specify_signature( const T& );
 }
 } // mock
 
 #define MOCK_SIGNATURE(M) \
     mock::detail::signature< \
         BOOST_TYPEOF( \
-            mock::detail::ambiguous_method_name_use_MOCK_METHOD_EXT_instead( \
+            mock::detail::ambiguous_method_requires_to_specify_signature( \
                 &base_type::M ) ) \
     >::type