diff --git a/apps/browser/src/background/runtime.background.ts b/apps/browser/src/background/runtime.background.ts
index 0b56c6eb962..a97728925c4 100644
--- a/apps/browser/src/background/runtime.background.ts
+++ b/apps/browser/src/background/runtime.background.ts
@@ -239,7 +239,6 @@ export default class RuntimeBackground {
           .assertCredential(msg.data, this.createAbortController(msg.requestId))
           .finally(() => this.abortControllers.delete(msg.requestId));
     }
-    return undefined;
   }
 
   private async autofillPage(tabToAutoFill: chrome.tabs.Tab) {