diff --git a/contrib/backup/functions b/contrib/backup/functions
index ddb529ddf..61a6f6c52 100644
--- a/contrib/backup/functions
+++ b/contrib/backup/functions
@@ -12,7 +12,7 @@ function get_backup_date () {
 }
 
 function delete_old_backups () {
-  test -d ${BACKUP_DIR} && find ${BACKUP_DIR}/*_zammad_*.gz -type f -mtime +${HOLD_DAYS} -exec rm -r \;
+  test -d ${BACKUP_DIR} && find ${BACKUP_DIR}/*_zammad_*.gz -type f -mtime +${HOLD_DAYS} -exec rm {} \;
 }
 
 function get_db_credentials () {