diff --git a/q921.c b/q921.c
index eeaf953..c6d9cd0 100644
--- a/q921.c
+++ b/q921.c
@@ -1220,6 +1220,9 @@ static pri_event *__q921_receive_qualified(struct pri *pri, q921_h *h, int len)
 			/* Acknowledge */
 			q921_send_ua(pri, h->u.p_f);
 			ev = q921_dchannel_down(pri);
+			if (BRI_TE_PTMP(pri)) {
+				q921_restart(pri, 0);
+			}
 			return ev;
 		case 3:
 			if (h->u.m2 == 3) {