diff --git a/redis/files/check_redis_instances.sh b/redis/files/check_redis_instances.sh
index a5dc484a..58d2ddb1 100644
--- a/redis/files/check_redis_instances.sh
+++ b/redis/files/check_redis_instances.sh
@@ -63,7 +63,7 @@ if systemctl is-enabled -q redis-server; then
 fi
 
 # additional instances
-conf_files=$(ls /etc/redis-*/redis.conf)
+conf_files=$(ls -1 /etc/redis-*/redis.conf)
 for conf_file in ${conf_files}; do
     name=$(dirname ${conf_file} | sed '{s|/etc/redis-||}')
     if systemctl is-enabled -q "redis-server@${name}.service"; then