diff --git a/conf/manjaro-tools.conf b/conf/manjaro-tools.conf
index 1640a93..6d2b3c5 100644
--- a/conf/manjaro-tools.conf
+++ b/conf/manjaro-tools.conf
@@ -72,7 +72,8 @@
 # iso app id
 # iso_app_id="Manjaro Linux Live/Rescue CD"
 
-# default compression
+# compression used, possible values xz (default, best compression), gzip, lzma, lzo, lz4
+# lz4 is faster but worst compression, may be useful for locally testing isos
 # iso_compression=xz
 
 # valid: md5, sha1, sha256, sha384, sha512