diff --git a/include/osmocom/msc/ran_msg.h b/include/osmocom/msc/ran_msg.h
index dc1483cb5..7df6564ef 100644
--- a/include/osmocom/msc/ran_msg.h
+++ b/include/osmocom/msc/ran_msg.h
@@ -103,6 +103,7 @@ struct ran_clear_command {
 struct ran_assignment_command {
 	const struct osmo_sockaddr_str *cn_rtp;
 	const struct gsm0808_channel_type *channel_type;
+	const struct sdp_audio_codecs *codecs;
 	enum nsap_addr_enc rab_assign_addr_enc;
 	bool osmux_present;
 	uint8_t osmux_cid;
diff --git a/src/libmsc/msc_a.c b/src/libmsc/msc_a.c
index 991661c55..084d04fcd 100644
--- a/src/libmsc/msc_a.c
+++ b/src/libmsc/msc_a.c
@@ -700,6 +700,7 @@ void msc_a_tx_assignment_cmd(struct msc_a *msc_a)
 		.assignment_command = {
 			.cn_rtp = &msc_a->cc.call_leg->rtp[RTP_TO_RAN]->local,
 			.channel_type = &channel_type,
+			.codecs = &cc_trans->cc.local.audio_codecs,
 			.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,