diff --git a/build.cake b/build.cake
index e6c77cd3f..e2b22cd71 100644
--- a/build.cake
+++ b/build.cake
@@ -166,7 +166,9 @@ Task("MergeOctoExe")
         ILRepack(
             $"{outputFolder}/Octo.exe",
             $"{inputFolder}/Octo.exe",
-            System.IO.Directory.EnumerateFiles(inputFolder, "*.dll").Select(f => (FilePath) f),
+            System.IO.Directory.EnumerateFiles(inputFolder, "*.dll")
+				.Union(System.IO.Directory.EnumerateFiles(inputFolder, "octodiff.exe"))
+				.Select(f => (FilePath) f),
             new ILRepackSettings {
                 Internalize = true,
                 Parallel = true,