diff --git a/meter/handler/handler.go b/meter/handler/handler.go
index 681a239c..264a4260 100644
--- a/meter/handler/handler.go
+++ b/meter/handler/handler.go
@@ -13,8 +13,6 @@ var (
 	_ MeterServer = &handler{}
 )
 
-type Empty struct{}
-
 type handler struct {
 	meter meter.Meter
 	opts  []meter.Option
diff --git a/meter/handler/handler.proto b/meter/handler/handler.proto
index eeee2e4b..6b7e61b5 100644
--- a/meter/handler/handler.proto
+++ b/meter/handler/handler.proto
@@ -17,7 +17,7 @@ service Meter {
             description: "Error response";
             schema: {
               json_schema: {
-                ref: "Empty";
+                ref: "micro.codec.Frame";
               }
             }
           }