diff --git a/src/osmo-bts-litecell15/tch.c b/src/osmo-bts-litecell15/tch.c
index 6ac27631a..3c6ee25f5 100644
--- a/src/osmo-bts-litecell15/tch.c
+++ b/src/osmo-bts-litecell15/tch.c
@@ -445,8 +445,7 @@ int l1if_tch_rx(struct gsm_bts_trx *trx, uint8_t chan_nr, struct msgb *l1p_msg)
 	case GsmL1_TchPlType_Amr:
 		rmsg = l1_to_rtppayload_amr(payload, payload_len, lchan);
 		break;
-	case GsmL1_TchPlType_Amr_SidFirstP2:
-		/* L1 do not give us SID_FIRST data, just indication */
+	case GsmL1_TchPlType_Amr_SidFirstP1:
 		memcpy(sid_first, payload, payload_len);
 		int len = osmo_amr_rtp_enc(sid_first, 0, AMR_SID, AMR_GOOD);
 		if (len < 0)
diff --git a/src/osmo-bts-sysmo/tch.c b/src/osmo-bts-sysmo/tch.c
index 4ea95c5f2..745923c04 100644
--- a/src/osmo-bts-sysmo/tch.c
+++ b/src/osmo-bts-sysmo/tch.c
@@ -548,8 +548,7 @@ int l1if_tch_rx(struct gsm_bts_trx *trx, uint8_t chan_nr, struct msgb *l1p_msg)
 	case GsmL1_TchPlType_Amr:
 		rmsg = l1_to_rtppayload_amr(payload, payload_len, lchan);
 		break;
-	case GsmL1_TchPlType_Amr_SidFirstP2:
-		/* L1 do not give us SID_FIRST data, just indication */
+	case GsmL1_TchPlType_Amr_SidFirstP1:
 		memcpy(sid_first, payload, payload_len);
 		int len = osmo_amr_rtp_enc(sid_first, 0, AMR_SID, AMR_GOOD);
 		if (len < 0)