diff --git a/include/crow/routing.h b/include/crow/routing.h
index bb6fbc614..7a8eaded1 100644
--- a/include/crow/routing.h
+++ b/include/crow/routing.h
@@ -546,7 +546,7 @@ namespace crow
 #else
                 [f]
 #endif
-                (const crow::request& req, crow::response& res, Args ... args){
+                (const crow::request&, crow::response& res, Args ... args){
                   f(res, args...);
                 });
         }