--- /etc/zfs/zfs-functions      2016-04-06 17:52:08.000000000 +0200
+++ /target/etc/zfs/zfs-functions       2016-04-15 13:32:04.512421085 +0200
@@ -1081,8 +1081,8 @@
 
        # Get all snapshots, recursivly (might need to clone /usr, /var etc
        # as well).
-       for s in $("${ZFS}" list -H -oname -tsnapshot -r "${rootfs}" | \
-           grep "${snapname}")
+       for s in $(IFS= "${ZFS}" list -H -oname -tsnapshot -r "${rootfs}" | \
+           grep "@${snapname}$")
        do
                if grep -qiE '(^|[^\\](\\\\)* )(rollback)=(on|yes|true|1)( |$)' /proc/cmdline
                then