diff --git a/18/c642da869876da1100d046e8ac6556c3638e91 b/18/c642da869876da1100d046e8ac6556c3638e91
new file mode 100644
index 0000000000..73ace88afe
--- /dev/null
+++ b/18/c642da869876da1100d046e8ac6556c3638e91
@@ -0,0 +1 @@
+Merged: https://github.com/ruby/ruby/pull/3599