diff --git a/lib/dns/adb.c b/lib/dns/adb.c
index cb9539a778..95ca2d4070 100644
--- a/lib/dns/adb.c
+++ b/lib/dns/adb.c
@@ -2055,6 +2055,7 @@ destroy(dns_adb_t *adb) {
 		dns_adbnamebucket_t *nbucket = NULL;
 		isc_ht_iter_current(it, (void **)&nbucket);
 		cleanup_names(nbucket, INT_MAX);
+		isc_mutex_destroy(&nbucket->lock);
 		isc_mem_put(adb->mctx, nbucket, sizeof(*nbucket));
 	}
 	isc_ht_iter_destroy(&it);
@@ -2070,6 +2071,7 @@ destroy(dns_adb_t *adb) {
 		dns_adbentrybucket_t *ebucket = NULL;
 		isc_ht_iter_current(it, (void **)&ebucket);
 		cleanup_entries(ebucket, INT_MAX);
+		isc_mutex_destroy(&ebucket->lock);
 		isc_mem_put(adb->mctx, ebucket, sizeof(*ebucket));
 	}
 	isc_ht_iter_destroy(&it);
diff --git a/lib/dns/resolver.c b/lib/dns/resolver.c
index cd8ccd5f83..f6e976d37f 100644
--- a/lib/dns/resolver.c
+++ b/lib/dns/resolver.c
@@ -10094,6 +10094,7 @@ destroy(dns_resolver_t *res) {
 	}
 	isc_ht_iter_destroy(&it);
 	isc_ht_destroy(&res->buckets);
+	isc_rwlock_destroy(&res->hash_lock);
 
 	isc_ht_iter_create(res->zonebuckets, &it);
 	for (result = isc_ht_iter_first(it); result == ISC_R_SUCCESS;
@@ -10109,10 +10110,12 @@ destroy(dns_resolver_t *res) {
 			ISC_LIST_UNLINK(bucket->list, fc, link);
 			isc_mem_put(res->mctx, fc, sizeof(*fc));
 		}
+		isc_mutex_destroy(&bucket->lock);
 		isc_mem_put(res->mctx, bucket, sizeof(*bucket));
 	}
 	isc_ht_iter_destroy(&it);
 	isc_ht_destroy(&res->zonebuckets);
+	isc_rwlock_destroy(&res->zonehash_lock);
 
 	if (res->dispatches4 != NULL) {
 		dns_dispatchset_destroy(&res->dispatches4);