diff --git a/extensions/telegram/src/topic-name-cache.ts b/extensions/telegram/src/topic-name-cache.ts
index 530ef40de4c..dcadda49cb2 100644
--- a/extensions/telegram/src/topic-name-cache.ts
+++ b/extensions/telegram/src/topic-name-cache.ts
@@ -61,7 +61,7 @@ export function getTopicName(
     cache.set(key, refreshedEntry);
     return refreshedEntry.name;
   }
-  return entry?.name;
+  return undefined;
 }
 
 export function getTopicEntry(