diff --git a/f4/b88959d51e02d6253f0132833dc47cf915ffa2 b/f4/b88959d51e02d6253f0132833dc47cf915ffa2
new file mode 100644
index 0000000000..e0e5ca4add
--- /dev/null
+++ b/f4/b88959d51e02d6253f0132833dc47cf915ffa2
@@ -0,0 +1 @@
+Merged: https://github.com/ruby/ruby/pull/4778