diff --git a/ROOT/etc/chem-zfs-backup-server/zfs-rsync.d/prepare b/ROOT/etc/chem-zfs-backup-server/zfs-rsync.d/prepare
index 00f6ecf0a4c3e5e1d40da522cf4d055537d81cde..28b598fb9c2a2a2593b5a8a2603049c76157ca6e 100755
--- a/ROOT/etc/chem-zfs-backup-server/zfs-rsync.d/prepare
+++ b/ROOT/etc/chem-zfs-backup-server/zfs-rsync.d/prepare
@@ -74,6 +74,7 @@ if $SSH root@$SERVER id postgres >/dev/null 2>&1 ; then
 fi
 
 $SSH root@$SERVER "
+set -e
 # Ensure that things are not readable where they ought not to be
 umask 077