diff --git a/lib/ns/query.c b/lib/ns/query.c
index c80612ef07..492d716f50 100644
--- a/lib/ns/query.c
+++ b/lib/ns/query.c
@@ -2372,7 +2372,7 @@ free_devent(ns_client_t *client, isc_event_t **eventp,
 		dns_db_detach(&devent->db);
 	if (devent->rdataset != NULL)
 		query_putrdataset(client, &devent->rdataset);
-	if (devent->rdataset != NULL)
+	if (devent->sigrdataset != NULL)
 		query_putrdataset(client, &devent->sigrdataset);
 	/*
 	 * If the two pointers are the same then leave the setting of