diff --git a/lib/modules/auth/ConfirmationResult.js b/lib/modules/auth/ConfirmationResult.js
index 6bfda24a..0c1c09b3 100644
--- a/lib/modules/auth/ConfirmationResult.js
+++ b/lib/modules/auth/ConfirmationResult.js
@@ -27,6 +27,6 @@ export default class ConfirmationResult {
   }
 
   get verificationId(): String | null {
-    return _verificationId;
+    return this._verificationId;
   }
 }