diff --git a/bin/named/fuzz.c b/bin/named/fuzz.c
index b935764c7b..6996529d83 100644
--- a/bin/named/fuzz.c
+++ b/bin/named/fuzz.c
@@ -577,6 +577,7 @@ fuzz_thread_resolver(void *arg) {
 	}
 
 	free(buf);
+	free(rbuf);
 	close(sockfd);
 	close(listenfd);
 	named_server_flushonshutdown(named_g_server, ISC_FALSE);