diff --git a/src/mtp_layer3.c b/src/mtp_layer3.c
index 95e5dfc..dc24a73 100644
--- a/src/mtp_layer3.c
+++ b/src/mtp_layer3.c
@@ -465,7 +465,7 @@
 	return 0;
 }
 
-int mtp_link_set_data(struct mtp_link *link, struct msgb *msg)
+int mtp_link_handle_data(struct mtp_link *link, struct msgb *msg)
 {
 	int rc = -1;
 	struct mtp_level_3_hdr *hdr;
diff --git a/src/ss7_application.c b/src/ss7_application.c
index 0609603..831ae1e 100644
--- a/src/ss7_application.c
+++ b/src/ss7_application.c
@@ -398,3 +398,16 @@
 	rate_ctr_inc(&link->set->ctrg->ctr[MTP_LSET_TOTA_OUT_MSG]);
 	link->write(link, msg);
 }
+
+int mtp_link_set_data(struct mtp_link *link, struct msgb *msg)
+{
+	if (link->set->app && link->set->app->type == APP_STP) {
+		if (!link->set->app->route_src.up || !link->set->app->route_dst.up) {
+			LOGP(DINP, LOGL_NOTICE, "Not handling data as application is down %d/%s.\n",
+			     link->set->app->nr, link->set->app->name);
+			return -1;
+		}
+	}
+
+	return mtp_link_handle_data(link, msg);
+}