diff --git a/src/OpenIddict.Abstractions/OpenIddictConstants.cs b/src/OpenIddict.Abstractions/OpenIddictConstants.cs
index 5628d145..9f6401c7 100644
--- a/src/OpenIddict.Abstractions/OpenIddictConstants.cs
+++ b/src/OpenIddict.Abstractions/OpenIddictConstants.cs
@@ -242,10 +242,10 @@ public static class OpenIddictConstants
         public const string SlowDown = "slow_down";
         public const string TemporarilyUnavailable = "temporarily_unavailable";
         public const string UnauthorizedClient = "unauthorized_client";
+        public const string UnmetAuthenticationRequirements = "unmet_authentication_requirements";
         public const string UnsupportedGrantType = "unsupported_grant_type";
         public const string UnsupportedResponseType = "unsupported_response_type";
         public const string UnsupportedTokenType = "unsupported_token_type";
-        public const string UnmetAuthenticationRequirements = "unmet_authentication_requirements";
     }
 
     public static class GrantTypes