diff --git a/FirebaseAuth/CHANGELOG.md b/FirebaseAuth/CHANGELOG.md
index 143e9dfedc6..b2bce553f71 100644
--- a/FirebaseAuth/CHANGELOG.md
+++ b/FirebaseAuth/CHANGELOG.md
@@ -1,3 +1,7 @@
+# Unreleased
+- [fixed] Fix a formatting issue with generated TOTP URLs that prevented them
+  from working with the Google Authenticator app. (#15128)
+
 # 12.0.0
 - [removed] **Breaking Change**: Removed the following Dynamic Links related
   APIs: