diff --git a/sol/function_types.hpp b/sol/function_types.hpp
index d121c8c6..f96481df 100644
--- a/sol/function_types.hpp
+++ b/sol/function_types.hpp
@@ -259,7 +259,7 @@ struct base_function {
         }
 
         template <std::size_t limit>
-        static void func_gc (std::true_type, lua_State* L) {
+        static void func_gc (std::true_type, lua_State*) {
 
         }