diff --git a/aliases/available/osx.aliases.bash b/aliases/available/osx.aliases.bash
index 796102f..a688cf6 100644
--- a/aliases/available/osx.aliases.bash
+++ b/aliases/available/osx.aliases.bash
@@ -19,4 +19,5 @@
   unalias firefox
 fi
 
+# Requires growlnotify, which can be found in the Growl DMG under "Extras"
 alias grnot='growlnotify -s -t Terminal -m "Done"'