diff --git a/src/Core/Constants.cs b/src/Core/Constants.cs
index 9ffe199f1d..c3c5cb5e5b 100644
--- a/src/Core/Constants.cs
+++ b/src/Core/Constants.cs
@@ -174,6 +174,7 @@ public static class FeatureFlagKeys
     public const string MacOsNativeCredentialSync = "macos-native-credential-sync";
     public const string WindowsDesktopAutotype = "windows-desktop-autotype";
     public const string WindowsDesktopAutotypeGA = "windows-desktop-autotype-ga";
+    public const string NotificationUndeterminedCipherScenarioLogic = "undetermined-cipher-scenario-logic";
 
     /* Billing Team */
     public const string TrialPayment = "PM-8163-trial-payment";