diff --git a/ui/round/src/socket.ts b/ui/round/src/socket.ts
index ccf2231a05..e121510428 100644
--- a/ui/round/src/socket.ts
+++ b/ui/round/src/socket.ts
@@ -46,7 +46,7 @@ function backoff(delay: number, factor: number, callback: (...args: any[]) => vo
     if (timer) clearTimeout(timer);
 
     if (elapsed > delay) exec();
-    else timer = window.setTimeout(exec, delay - elapsed);
+    else timer = setTimeout(exec, delay - elapsed);
   }
 }