diff --git a/lib/dns/catz.c b/lib/dns/catz.c
index 1c0dfc1621..f3396338a9 100644
--- a/lib/dns/catz.c
+++ b/lib/dns/catz.c
@@ -842,6 +842,7 @@ dns_catz_new_zone(dns_catz_zones_t *catzs, dns_catz_zone_t **zonep,
 
 cleanup_ht:
 	isc_ht_destroy(&new_zone->entries);
+	isc_ht_destroy(&new_zone->coos);
 	dns_name_free(&new_zone->name, catzs->mctx);
 	isc_mem_put(catzs->mctx, new_zone, sizeof(*new_zone));