diff --git a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go
index 32ea7bd6cd5..420e430669c 100644
--- a/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go
+++ b/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/responsewriters/writers.go
@@ -109,9 +109,6 @@ func WriteObjectNegotiated(ctx request.Context, s runtime.NegotiatedSerializer,
 		audit.LogResponseObject(ae, object, gv, s)
 	}
 
-	w.Header().Set("Content-Type", serializer.MediaType)
-	w.WriteHeader(statusCode)
-
 	encoder := s.EncoderForVersion(serializer.Serializer, gv)
 	SerializeObject(serializer.MediaType, encoder, w, req, statusCode, object)
 }