diff --git a/src/Core/Constants.cs b/src/Core/Constants.cs
index 42cec5e5cc..622e570a0f 100644
--- a/src/Core/Constants.cs
+++ b/src/Core/Constants.cs
@@ -131,6 +131,7 @@ public static class FeatureFlagKeys
     public const string ProviderClientVaultPrivacyBanner = "ac-2833-provider-client-vault-privacy-banner";
     public const string DeviceTrustLogging = "pm-8285-device-trust-logging";
     public const string AuthenticatorTwoFactorToken = "authenticator-2fa-token";
+    public const string EnableUpgradePasswordManagerSub = "AC-2708-upgrade-password-manager-sub";
 
     public static List<string> GetAllKeys()
     {