diff --git a/pfsense-backup.sh b/pfsense-backup.sh
index 3d21a3b..2f8a061 100755
--- a/pfsense-backup.sh
+++ b/pfsense-backup.sh
@@ -66,7 +66,7 @@ if [ $cron -eq 1 ]; then
   else
     do_backup
     if [ ! -z $keepfiles ]; then
-     ls -d -1tr $destination/* | head -n -$keepfiles | xargs -d '\n' rm -f
+     ls -d -1tr $destination/*.xml | head -n -$keepfiles | xargs -d '\n' rm -f
     fi
   fi
 else