diff --git a/src/libraries/turtle/mock.hpp b/src/libraries/turtle/mock.hpp
index 1bf71f6..0646ad5 100644
--- a/src/libraries/turtle/mock.hpp
+++ b/src/libraries/turtle/mock.hpp
@@ -73,7 +73,7 @@ namespace detail
     // if an error is generated by the line below it means
     // the method is ambiguous : use MOCK_METHOD_EXT instead
     template< typename T >
-    T& invalid_pointer_to_member( const T& );
+    T& ambiguous_method_name_use_MOCK_METHOD_EXT_instead( const T& );
 }
 
 #define MOCK_BASE_CLASS(T, I) \
@@ -103,7 +103,7 @@ namespace detail
 
 #define MOCK_SIGNATURE(M) \
     mock::detail::signature< \
-        BOOST_TYPEOF( mock::invalid_pointer_to_member( &base_type::M ) ) \
+        BOOST_TYPEOF( mock::ambiguous_method_name_use_MOCK_METHOD_EXT_instead( &base_type::M ) ) \
     >::type
 
 #define MOCK_METHOD_AUX(M, n, S, t, c, tpn) \