diff --git a/include/osmocom/msc/ran_msg.h b/include/osmocom/msc/ran_msg.h
index 1b0e2e8b6..3b08b466c 100644
--- a/include/osmocom/msc/ran_msg.h
+++ b/include/osmocom/msc/ran_msg.h
@@ -86,6 +86,8 @@ struct ran_assignment_command {
 	enum nsap_addr_enc rab_assign_addr_enc;
 	bool osmux_present;
 	uint8_t osmux_cid;
+	bool call_id_present;
+	uint32_t call_id;
 };
 
 struct ran_cipher_mode_command {
diff --git a/src/libmsc/msc_a.c b/src/libmsc/msc_a.c
index 4d856d0f8..3bfc0f839 100644
--- a/src/libmsc/msc_a.c
+++ b/src/libmsc/msc_a.c
@@ -541,6 +541,8 @@ static void msc_a_call_leg_ran_local_addr_available(struct msc_a *msc_a)
 			.channel_type = &channel_type,
 			.osmux_present = msc_a->cc.call_leg->rtp[RTP_TO_RAN]->use_osmux,
 			.osmux_cid = msc_a->cc.call_leg->rtp[RTP_TO_RAN]->local_osmux_cid,
+			.call_id_present = true,
+			.call_id = cc_trans->callref,
 		},
 	};
 	if (msc_a_ran_down(msc_a, MSC_ROLE_I, &msg)) {
diff --git a/src/libmsc/ran_msg_a.c b/src/libmsc/ran_msg_a.c
index 28f99ceee..e6dee52d5 100644
--- a/src/libmsc/ran_msg_a.c
+++ b/src/libmsc/ran_msg_a.c
@@ -959,6 +959,7 @@ static struct msgb *ran_a_make_assignment_command(struct osmo_fsm_inst *log_fi,
 	struct sockaddr_storage rtp_addr;
 	struct sockaddr_storage *use_rtp_addr = NULL;
 	struct msgb *msg;
+	const uint32_t *call_id = NULL;
 	int rc;
 
 	if (!ac->channel_type) {
@@ -999,7 +1000,10 @@ static struct msgb *ran_a_make_assignment_command(struct osmo_fsm_inst *log_fi,
 		}
 	}
 
-	msg = gsm0808_create_ass(ac->channel_type, NULL, use_rtp_addr, use_scl, NULL);
+	if(ac->call_id_present == true)
+		call_id = &ac->call_id;
+
+	msg = gsm0808_create_ass(ac->channel_type, NULL, use_rtp_addr, use_scl, call_id);
 	if (ac->osmux_present)
 		_gsm0808_assignment_extend_osmux(msg, ac->osmux_cid);
 	return msg;