diff --git a/src/Core/Constants.cs b/src/Core/Constants.cs
index 9cbf6b788a..e09422871d 100644
--- a/src/Core/Constants.cs
+++ b/src/Core/Constants.cs
@@ -176,6 +176,7 @@ public static class FeatureFlagKeys
     public const string AndroidImportLoginsFlow = "import-logins-flow";
     public const string PM12276Breadcrumbing = "pm-12276-breadcrumbing-for-business-features";
     public const string PM18794_ProviderPaymentMethod = "pm-18794-provider-payment-method";
+    public const string PM3553_MobileSimpleLoginSelfHostAlias = "simple-login-self-host-alias";
 
     public static List<string> GetAllKeys()
     {