diff --git a/sol/function.hpp b/sol/function.hpp
index 0edbf854..47100c16 100644
--- a/sol/function.hpp
+++ b/sol/function.hpp
@@ -96,7 +96,7 @@ struct pusher<function_sig_t<Sigs...>> {
         set_isconvertible_fx(is_convertible(), t, L, std::forward<Fx>(fx));
     }
 
-    template<typename... Args, typename Fx, typename... Cx, typename R = typename std::result_of<Fx(Args...)>::type>
+    template<typename... Args, typename Fx, typename R = typename std::result_of<Fx(Args...)>::type>
     static void set_memfx(types<Args...>, lua_State* L, Fx&& fx){
         set_memfx(types<R(Args...)>(), L, std::forward<Fx>(fx));
     }