diff --git a/include/osmocom/msc/osmo_msc.h b/include/osmocom/msc/osmo_msc.h
index 3ffb65c91..a757a9940 100644
--- a/include/osmocom/msc/osmo_msc.h
+++ b/include/osmocom/msc/osmo_msc.h
@@ -63,8 +63,7 @@ void msc_sapi_n_reject(struct gsm_subscriber_connection *conn, int dlci);
 int msc_clear_request(struct gsm_subscriber_connection *conn, uint32_t cause);
 int msc_compl_l3(struct gsm_subscriber_connection *conn,
 		 struct msgb *msg, uint16_t chosen_channel);
-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);
 int msc_classmark_request_then_cipher_mode_cmd(struct gsm_subscriber_connection *conn, bool umts_aka,
 					       bool retrieve_imeisv);
 int msc_geran_set_cipher_mode(struct gsm_subscriber_connection *conn, bool umts_aka, bool retrieve_imeisv);
diff --git a/src/libmsc/a_iface_bssap.c b/src/libmsc/a_iface_bssap.c
index c11347eb2..9a2333db5 100644
--- a/src/libmsc/a_iface_bssap.c
+++ b/src/libmsc/a_iface_bssap.c
@@ -686,7 +686,7 @@ static int rx_dtap(const struct osmo_sccp_user *scu, const struct a_conn_info *a
 	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 a3092f86e..95bbbeeae 100644
--- a/src/libmsc/iucs.c
+++ b/src/libmsc/iucs.c
@@ -173,7 +173,7 @@ int gsm0408_rcvmsg_iucs(struct gsm_network *network, struct msgb *msg,
 		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 c9ecb64ab..f2c84e629 100644
--- a/src/libmsc/osmo_msc.c
+++ b/src/libmsc/osmo_msc.c
@@ -121,7 +121,7 @@ int msc_compl_l3(struct gsm_subscriber_connection *conn,
 }
 
 /* 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);
diff --git a/tests/msc_vlr/msc_vlr_tests.c b/tests/msc_vlr/msc_vlr_tests.c
index 9515c63eb..6cf927c2f 100644
--- a/tests/msc_vlr/msc_vlr_tests.c
+++ b/tests/msc_vlr/msc_vlr_tests.c
@@ -232,7 +232,7 @@ void rx_from_ms(struct msgb *msg)
 		    && (gsm48_hdr_msg_type(gh) == GSM48_MT_RR_CIPH_M_COMPL))
 			msc_cipher_mode_compl(g_conn, msg, 0);
 		else
-			msc_dtap(g_conn, 23, msg);
+			msc_dtap(g_conn, msg);
 	}
 
 	if (!conn_exists(g_conn))