diff --git a/packages/backend-common/src/reading/tree/util.ts b/packages/backend-common/src/reading/tree/util.ts
index 1d7a42c93e..49c696467c 100644
--- a/packages/backend-common/src/reading/tree/util.ts
+++ b/packages/backend-common/src/reading/tree/util.ts
@@ -44,7 +44,7 @@ export async function streamToTimeoutPromise<T>(
     }, options.timeoutMs);
   });
 
-  await new Promise(function (resolve, reject) {
+  await new Promise((resolve, reject) => {
     stream.on('finish', resolve);
     stream.on('error', reject);
   });