diff --git a/initrd/dracut/tzpfms-load-key.sh b/initrd/dracut/tzpfms-load-key.sh
index b0e2467..bd3ce37 100755
--- a/initrd/dracut/tzpfms-load-key.sh
+++ b/initrd/dracut/tzpfms-load-key.sh
@@ -31,7 +31,7 @@ done
 
 
 if [ "$root" = "zfs:AUTO" ] ; then
-    BOOTFS="$(zpool list -H -o bootfs | awk '!/^-$/ {print; exit}')"
+    BOOTFS="$(zpool list -H -o bootfs | while read -r b; do [ "$b" = '-' ] || { printf '%s\n' "$b"; exit; }; done)"
 else
     BOOTFS="${root##zfs:}"
     BOOTFS="${BOOTFS##ZFS=}"