diff --git a/sh/btrfs.sh b/sh/btrfs.sh
index 1172d2d..253be28 100644
--- a/sh/btrfs.sh
+++ b/sh/btrfs.sh
@@ -1,4 +1,5 @@
-bsl() {
+bsl() { sh_btrfs_subvolume_list "${@}"; }
+sh_btrfs_subvolume_list() {
 	if [ -n "${1}" ]; then
 		btrfs subvolume list "${1}" |
 			cut --delimiter " " --fields 9 |