diff --git a/src/http/modules/ngx_http_image_filter_module.c b/src/http/modules/ngx_http_image_filter_module.c
index b5f8425a8..4434a1ef9 100644
--- a/src/http/modules/ngx_http_image_filter_module.c
+++ b/src/http/modules/ngx_http_image_filter_module.c
@@ -228,7 +228,7 @@ ngx_http_image_header_filter(ngx_http_request_t *r)
         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                       "image filter: too big response: %O", len);
 
-        return NGX_ERROR;
+        return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
     }
 
     if (len == -1) {