diff --git a/templates/borgbackup.sh b/templates/borgbackup.sh
index 5ddf124..c93e0b4 100644
--- a/templates/borgbackup.sh
+++ b/templates/borgbackup.sh
@@ -45,7 +45,7 @@ backup_exit=$?
 
 # Prune old backups: keep 7 daily, 3 weekly and 2 monthly (3 months total)
 borg prune                          \
-    --prefix '{{ borgbackup_hostname }}-' \
+    --glob-archives '{{ borgbackup_hostname }}-*' \
     --keep-daily    7               \
     --keep-weekly   3               \
     --keep-monthly  2