diff --git a/build-emacs-for-macos b/build-emacs-for-macos
index 7b3b667..a1d4705 100755
--- a/build-emacs-for-macos
+++ b/build-emacs-for-macos
@@ -677,6 +677,7 @@ class LibEmbedder < AbstractEmbedder
     mode = File.stat(file).mode
     File.chmod(0o775, file)
     yield
+  ensure
     File.chmod(mode, file)
   end
 end