diff --git a/Octokit/Models/Common/CheckStatus.cs b/Octokit/Models/Common/CheckStatus.cs
index caf28b65b7..f6ce856b67 100644
--- a/Octokit/Models/Common/CheckStatus.cs
+++ b/Octokit/Models/Common/CheckStatus.cs
@@ -37,6 +37,9 @@ public enum CheckConclusion
 
         [Parameter(Value = "skipped")]
         Skipped,
+        
+        [Parameter(Value = "stale")]
+        Stale,
     }
 
     public enum CheckAnnotationLevel