diff --git a/response_writer.go b/response_writer.go
index 753a0b09..d7b0dc21 100644
--- a/response_writer.go
+++ b/response_writer.go
@@ -68,6 +68,8 @@ func (w *responseWriter) WriteHeader(code int) {
 			return
 		}
 		w.status = code
+		w.size = 0
+		w.ResponseWriter.WriteHeader(code)
 	}
 }