diff --git a/Octokit/Helpers/ReferenceExtensions.cs b/Octokit/Helpers/ReferenceExtensions.cs
index 87ffddc6..c3bcc165 100644
--- a/Octokit/Helpers/ReferenceExtensions.cs
+++ b/Octokit/Helpers/ReferenceExtensions.cs
@@ -3,7 +3,7 @@
 namespace Octokit.Helpers
 {
     /// <summary>
-    /// Represents operations to simplify workink with references
+    /// Represents operations to simplify working with references
     /// </summary>
     public static class ReferenceExtensions
     {