diff --git a/pages/_app.tsx b/pages/_app.tsx
index 8c66b27a186..48333ee72b1 100644
--- a/pages/_app.tsx
+++ b/pages/_app.tsx
@@ -28,10 +28,8 @@ import "../src/test-prep";
 import "../src/base.css";
 
 if (typeof window !== "undefined") {
-  // @ts-expect-error
   Promise.prototype.finally = function (callback) {
-    debugger;
-    this.then(
+    return this.then(
       result => {
         callback && callback();
         return result;