diff --git a/turtle/detail/function.hpp b/turtle/detail/function.hpp
index 77eb4cd..820a3ac 100644
--- a/turtle/detail/function.hpp
+++ b/turtle/detail/function.hpp
@@ -83,9 +83,8 @@ namespace detail
 
         E* e_;
     };
-
-}
 }
+} // mock
 
 #define MOCK_NUM_ARGS 0
 #define MOCK_NUM_ARGS_0