diff --git a/src/proto_http.c b/src/proto_http.c
index fcfd9bcea..c9d412483 100644
--- a/src/proto_http.c
+++ b/src/proto_http.c
@@ -619,8 +619,11 @@ int http_remove_header2(struct http_msg *msg, struct buffer *buf,
 static void http_server_error(struct session *t, struct stream_interface *si,
 			      int err, int finst, int status, const struct chunk *msg)
 {
+	buffer_auto_read(si->ob);
+	buffer_abort(si->ob);
+	buffer_auto_close(si->ob);
+	buffer_erase(si->ob);
 	buffer_erase(si->ob);
-	buffer_erase(si->ib);
 	buffer_auto_close(si->ib);
 	buffer_auto_read(si->ib);
 	if (status > 0 && msg) {