diff --git a/toys/createindex b/toys/createindex
index 9eec4c4..a7274d5 100755
--- a/toys/createindex
+++ b/toys/createindex
@@ -43,6 +43,7 @@ do
 	source "$function"
 done
 
+args="$@"
 while [ -n "$1" ]
 do
 	opt="$1"
@@ -194,11 +195,27 @@ then
 	updateTags
 fi
 
+echo 'SELECT IFNULL(
+	(SELECT last_seen FROM source_files ORDER BY last_seen DESC LIMIT 1),
+	0);' >&3
+read -u4 lastupdate
+
 if ! [[ "$output" == - ]]
 then
 	exec > "$output"
 fi
 
+cat <<-EOBrag
+	# Generated by AtOM's createindex toy.
+	# https://gitorious.org/atom
+	# (C) 2012-2013 Vincent Riquer (GPL-3)
+	# 
+	# $0 $args
+	#
+	# Last database update: $(date -d @$lastupdate +'%x %X')
+
+EOBrag
+
 printDate() {
 	date -d"@$1" +"${timeformat:-%x %X}"
 }