diff --git a/lxc_backup.sh b/lxc_backup.sh
index 93affeb..329f0b6 100755
--- a/lxc_backup.sh
+++ b/lxc_backup.sh
@@ -20,8 +20,8 @@ then
 	exit 2
 fi
 
-#containder without an backup ends with 0
-for container in $(${lxccmd} list --format csv -c n | grep -vE "0$|backup");
+#only backup container which contain a 1 at the end of the line
+for container in $(${lxccmd} list --format csv -c n | grep  "1$");
 do 
 	${lxccmd} copy ${container} ${container}-backup
 	${lxccmd} export ${container}-backup ${backuppath}$(date +%Y_%m_%d)-lxc-${container}.tar.gz --instance-only --optimized-storage