diff --git a/sh/fs.sh b/sh/fs.sh
index ac46f6d..0db5696 100644
--- a/sh/fs.sh
+++ b/sh/fs.sh
@@ -5,7 +5,7 @@ rwx_fs_make_btrfs() {
 	if [ -b "${device}" ]; then
 		set -- \
 			--force \
-			--checksum "sha256"
+			--checksum "blake2"
 		if [ -n "${label}" ]; then
 			set -- "${@}" \
 				--label "${label}"