diff --git a/epan/addr_resolv.c b/epan/addr_resolv.c

index 3b0c944..6f8786b 100644

--- a/epan/addr_resolv.c

+++ b/epan/addr_resolv.c

@@ -2531,6 +2531,7 @@ _host_name_lookup_cleanup(void) {

   }

   g_list_free(async_dns_queue_head);

+  async_dns_queue_head = NULL;

   if (async_dns_initialized) {

     ares_destroy(ghba_chan);