diff --git a/src/wps/wps_upnp.c b/src/wps/wps_upnp.c
index 933d7340e..44318e094 100644
--- a/src/wps/wps_upnp.c
+++ b/src/wps/wps_upnp.c
@@ -695,6 +695,7 @@ struct subscription * subscription_start(struct upnp_wps_device_sm *sm,
 	struct subscription *s;
 	time_t now = time(NULL);
 	time_t expire = now + UPNP_SUBSCRIBE_SEC;
+	char str[80];
 
 	/* Get rid of expired subscriptions so we have room */
 	subscription_list_age(sm, now);
@@ -743,8 +744,10 @@ struct subscription * subscription_start(struct upnp_wps_device_sm *sm,
 		subscription_destroy(s);
 		return NULL;
 	}
-	wpa_printf(MSG_DEBUG, "WPS UPnP: Subscription %p started with %s",
-		   s, callback_urls);
+	uuid_bin2str(s->uuid, str, sizeof(str));
+	wpa_printf(MSG_DEBUG,
+		   "WPS UPnP: Subscription %p (SID %s) started with %s",
+		   s, str, callback_urls);
 	/* Schedule sending this */
 	event_send_all_later(sm);
 	return s;
diff --git a/src/wps/wps_upnp_web.c b/src/wps/wps_upnp_web.c
index b1cf571d8..3ec48fc20 100644
--- a/src/wps/wps_upnp_web.c
+++ b/src/wps/wps_upnp_web.c
@@ -1214,18 +1214,25 @@ static void web_connection_parse_unsubscribe(struct upnp_wps_device_sm *sm,
 	}
 
 	if (got_uuid) {
+		char str[80];
+
+		uuid_bin2str(uuid, str, sizeof(str));
+
 		s = subscription_find(sm, uuid);
 		if (s) {
 			struct subscr_addr *sa;
 			sa = dl_list_first(&s->addr_list, struct subscr_addr,
 					   list);
-			wpa_printf(MSG_DEBUG, "WPS UPnP: Unsubscribing %p %s",
-				   s, (sa && sa->domain_and_port) ?
+			wpa_printf(MSG_DEBUG,
+				   "WPS UPnP: Unsubscribing %p (SID %s) %s",
+				   s, str, (sa && sa->domain_and_port) ?
 				   sa->domain_and_port : "-null-");
 			dl_list_del(&s->list);
 			subscription_destroy(s);
 		} else {
-			wpa_printf(MSG_INFO, "WPS UPnP: Could not find matching subscription to unsubscribe");
+			wpa_printf(MSG_INFO,
+				   "WPS UPnP: Could not find matching subscription to unsubscribe (SID %s)",
+				   str);
 			ret = HTTP_PRECONDITION_FAILED;
 			goto send_msg;
 		}