diff --git a/src/Core/Enums/TwoFactorProviderType.cs b/src/Core/Enums/TwoFactorProviderType.cs
index 5a55e19455..898855c56a 100644
--- a/src/Core/Enums/TwoFactorProviderType.cs
+++ b/src/Core/Enums/TwoFactorProviderType.cs
@@ -5,6 +5,7 @@
         Authenticator = 0,
         Email = 1,
         Duo = 2,
-        YubiKey = 3
+        YubiKey = 3,
+        U2F = 4
     }
 }