diff --git a/bin/pacman_notify.sh b/bin/pacman_notify.sh
index 505b4a2..2c86b53 100755
--- a/bin/pacman_notify.sh
+++ b/bin/pacman_notify.sh
@@ -1,4 +1,7 @@
 #!/bin/sh
+#
+# NOTE: use with user cron, eg)
+# 0 */2 * * * $HOME/bin/pacman_notify.sh
 
 PKGS=$(checkupdates)
 uid=1000