diff --git a/src/components/middle/message/helpers/getCustomAppendixBg.ts b/src/components/middle/message/helpers/getCustomAppendixBg.ts
index 08ec33ad0..e8c6d58df 100644
--- a/src/components/middle/message/helpers/getCustomAppendixBg.ts
+++ b/src/components/middle/message/helpers/getCustomAppendixBg.ts
@@ -23,5 +23,5 @@ export default function getCustomAppendixBg(
   return requestMediaWorker({
     name: 'offscreen-canvas:getAppendixColorFromImage',
     args: [src, isOwn],
-  }, id % MAX_WORKERS);
+  }, Math.round(id) % MAX_WORKERS);
 }