diff --git a/GitTfs/Core/GitTreeBuilder.cs b/GitTfs/Core/GitTreeBuilder.cs
index 606d9049..ede9ad37 100644
--- a/GitTfs/Core/GitTreeBuilder.cs
+++ b/GitTfs/Core/GitTreeBuilder.cs
@@ -24,9 +24,9 @@ namespace Sep.Git.Tfs.Core
             _objectDatabase = objectDatabase;
         }
 
-        public void Add(string path, string file, string mode)
+        public void Add(string path, string file, LibGit2Sharp.Mode mode)
         {
-            _treeDefinition.Add(path, file, Mode.ToFileMode(mode));
+            _treeDefinition.Add(path, file, mode);
         }
 
         public void Remove(string path)
diff --git a/GitTfs/Core/IGitTreeBuilder.cs b/GitTfs/Core/IGitTreeBuilder.cs
index 65f882bf..1e8fd334 100644
--- a/GitTfs/Core/IGitTreeBuilder.cs
+++ b/GitTfs/Core/IGitTreeBuilder.cs
@@ -1,13 +1,8 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-
-namespace Sep.Git.Tfs.Core
+namespace Sep.Git.Tfs.Core
 {
     public interface IGitTreeBuilder
     {
-        void Add(string path, string file, string mode);
+        void Add(string path, string file, LibGit2Sharp.Mode mode);
         void Remove(string path);
         string GetTree();
     }
diff --git a/GitTfs/Core/TfsChangeset.cs b/GitTfs/Core/TfsChangeset.cs
index ec73996f..332c655e 100644
--- a/GitTfs/Core/TfsChangeset.cs
+++ b/GitTfs/Core/TfsChangeset.cs
@@ -57,7 +57,7 @@ namespace Sep.Git.Tfs.Core
 
         private void Update(ApplicableChange change, IGitTreeBuilder treeBuilder, ITfsWorkspace workspace, IDictionary<string, GitObject> initialTree)
         {
-            treeBuilder.Add(change.GitPath, workspace.GetLocalPath(change.GitPath), change.Mode.ToModeString());
+            treeBuilder.Add(change.GitPath, workspace.GetLocalPath(change.GitPath), change.Mode);
         }
 
         public IEnumerable<TfsTreeEntry> GetTree()
@@ -126,7 +126,7 @@ namespace Sep.Git.Tfs.Core
         {
             if (item.DeletionId == 0)
             {
-                treeBuilder.Add(pathInGitRepo, workspace.GetLocalPath(pathInGitRepo), Mode.NewFile);
+                treeBuilder.Add(pathInGitRepo, workspace.GetLocalPath(pathInGitRepo), LibGit2Sharp.Mode.NonExecutableFile);
             }
         }