diff --git a/sys/netlink/netlink_io.c b/sys/netlink/netlink_io.c
index 0ca71fb6219..c6827c76c62 100644
--- a/sys/netlink/netlink_io.c
+++ b/sys/netlink/netlink_io.c
@@ -520,6 +520,7 @@ static void
 npt_clear(struct nl_pstate *npt)
 {
 	lb_clear(&npt->lb);
+	npt->cookie = NULL;
 	npt->error = 0;
 	npt->err_msg = NULL;
 	npt->err_off = 0;