diff --git a/src/Core/Constants.cs b/src/Core/Constants.cs
index 4a59d6e0de..fddf4c6fe3 100644
--- a/src/Core/Constants.cs
+++ b/src/Core/Constants.cs
@@ -136,6 +136,7 @@ public static class FeatureFlagKeys
     public const string EnableDeleteProvider = "AC-1218-delete-provider";
     public const string EmailVerification = "email-verification";
     public const string AnhFcmv1Migration = "anh-fcmv1-migration";
+    public const string ExtensionRefresh = "extension-refresh";
 
     public static List<string> GetAllKeys()
     {