diff --git a/src/Core/Constants.cs b/src/Core/Constants.cs
index 3908fcbf89..3db3b661f0 100644
--- a/src/Core/Constants.cs
+++ b/src/Core/Constants.cs
@@ -134,6 +134,7 @@ public static class FeatureFlagKeys
     public const string EnableUpgradePasswordManagerSub = "AC-2708-upgrade-password-manager-sub";
     public const string UnauthenticatedExtensionUIRefresh = "unauth-ui-refresh";
     public const string GenerateIdentityFillScriptRefactor = "generate-identity-fill-script-refactor";
+    public const string DelayFido2PageScriptInitWithinMv2 = "delay-fido2-page-script-init-within-mv2";
 
     public static List<string> GetAllKeys()
     {