diff --git a/LibGit2Sharp.Tests/PushFixture.cs b/LibGit2Sharp.Tests/PushFixture.cs
index 7dde5efd6..63703d57f 100644
--- a/LibGit2Sharp.Tests/PushFixture.cs
+++ b/LibGit2Sharp.Tests/PushFixture.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using LibGit2Sharp.Handlers;
diff --git a/LibGit2Sharp/Core/GitPushOptions.cs b/LibGit2Sharp/Core/GitPushOptions.cs
index d4bbcdc3f..075a62b6b 100644
--- a/LibGit2Sharp/Core/GitPushOptions.cs
+++ b/LibGit2Sharp/Core/GitPushOptions.cs
@@ -8,5 +8,6 @@ internal class GitPushOptions
         public int Version = 1;
         public int PackbuilderDegreeOfParallelism;
         public GitRemoteCallbacks RemoteCallbacks;
+        public GitStrArrayManaged CustomHeaders;
     }
 }