diff --git a/src/libmsc/a_iface_bssap.c b/src/libmsc/a_iface_bssap.c
index c11347e..9a2333d 100644
--- a/src/libmsc/a_iface_bssap.c
+++ b/src/libmsc/a_iface_bssap.c
@@ -686,7 +686,7 @@
 	OMSC_LINKID_CB(msg) = dtap->link_id;
 
 	/* Forward dtap payload into the msc */
-	msc_dtap(conn, conn->a.conn_id, msg);
+	msc_dtap(conn, msg);
 
 	return 0;
 }
diff --git a/src/libmsc/iucs.c b/src/libmsc/iucs.c
index a3092f8..95bbbee 100644
--- a/src/libmsc/iucs.c
+++ b/src/libmsc/iucs.c
@@ -173,7 +173,7 @@
 		uint8_t pdisc = gh->proto_discr & 0x0f;
 		OSMO_ASSERT(pdisc != GSM48_PDISC_RR);
 
-		msc_dtap(conn, ue_ctx->conn_id, msg);
+		msc_dtap(conn, msg);
 		rc = 0;
 	} else {
 		/* allocate a new connection */
diff --git a/src/libmsc/osmo_msc.c b/src/libmsc/osmo_msc.c
index c9ecb64..f2c84e6 100644
--- a/src/libmsc/osmo_msc.c
+++ b/src/libmsc/osmo_msc.c
@@ -121,7 +121,7 @@
 }
 
 /* Receive a DTAP message from BSC */
-void msc_dtap(struct gsm_subscriber_connection *conn, uint8_t link_id, struct msgb *msg)
+void msc_dtap(struct gsm_subscriber_connection *conn, struct msgb *msg)
 {
 	msc_subscr_conn_get(conn, MSC_CONN_USE_DTAP);
 	gsm0408_dispatch(conn, msg);