diff --git a/include/boost/python/detail/member_function_cast.hpp b/include/boost/python/detail/member_function_cast.hpp
index 3d965021..52718390 100644
--- a/include/boost/python/detail/member_function_cast.hpp
+++ b/include/boost/python/detail/member_function_cast.hpp
@@ -56,13 +56,13 @@ struct member_function_cast_impl
     }
 
     template <class S, class R, class A0, class A1>
-    static cast_helper<R(S::*)(A0,A1),R(T::*)(A0,A1) > stage1(R (S::*)(A0,A1))
+    static cast_helper<S,R(T::*)(A0,A1) > stage1(R (S::*)(A0,A1))
     {
         return cast_helper<R(S::*)(A0,A1),R(T::*)(A0,A1) >();
     }
 
     template <class S, class R, class A0, class A1,class A2>
-    static cast_helper<R(S::*)(A0,A1,A2),R(T::*)(A0,A1,A2) > stage1(R (S::*)(A0,A1,A2))
+    static cast_helper<S,R(T::*)(A0,A1,A2) > stage1(R (S::*)(A0,A1,A2))
     {
         return cast_helper<R(S::*)(A0,A1,A2),R(T::*)(A0,A1,A2) >();
     }