diff --git a/server.go b/server.go
index b44488b..9373d5e 100644
--- a/server.go
+++ b/server.go
@@ -618,6 +618,7 @@ func MakeHttpApiReceiver[T any](receiver *T) HttpApiReceiver {
 
 	tp := reflect.TypeOf(receiver)
 	name := tp.Elem().Name()
+	writerType := reflect.TypeOf((*http.ResponseWriter)(nil)).Elem()
 	for i := 0; i < tp.NumMethod(); i++ {
 		method := tp.Method(i)
 		if method.Type.NumIn() != 3 {
@@ -628,8 +629,7 @@ func MakeHttpApiReceiver[T any](receiver *T) HttpApiReceiver {
 			continue
 		}
 
-		var w http.ResponseWriter
-		if method.Type.In(1) != reflect.TypeOf(w) {
+		if !method.Type.In(1).Implements(writerType) {
 			continue
 		}