diff --git a/src/Core/Constants.cs b/src/Core/Constants.cs
index e85eee9a7d..23c51d5974 100644
--- a/src/Core/Constants.cs
+++ b/src/Core/Constants.cs
@@ -198,6 +198,7 @@ public static class FeatureFlagKeys
     public const string SecurityTasks = "security-tasks";
     public const string CipherKeyEncryption = "cipher-key-encryption";
     public const string DesktopCipherForm = "pm-18520-desktop-cipher-form";
+    public const string PM19941MigrateCipherDomainToSdk = "pm-19941-migrate-cipher-domain-to-sdk";
 
     public static List<string> GetAllKeys()
     {