diff --git a/zsh/expand-multiple-dots.zsh b/zsh/expand-multiple-dots.zsh
index 1c45c4c..def0e22 100644
--- a/zsh/expand-multiple-dots.zsh
+++ b/zsh/expand-multiple-dots.zsh
@@ -1,3 +1,5 @@
+# Based on http://stackoverflow.com/a/41420448/4757
+
 function expand-multiple-dots() {
     local MATCH
     if [[ $LBUFFER =~ '(^| )\.\.\.+' ]]; then