diff --git a/src/libbsc/abis_rsl.c b/src/libbsc/abis_rsl.c
index 3337b90..4f687a0 100644
--- a/src/libbsc/abis_rsl.c
+++ b/src/libbsc/abis_rsl.c
@@ -2450,7 +2450,7 @@
 	dh = (struct abis_rsl_dchan_hdr *) msgb_put(msg, sizeof(*dh));
 	init_dchan_hdr(dh, msg_type);
 	dh->c.msg_discr = ABIS_RSL_MDISC_DED_CHAN;
-	dh->chan_nr = gsm_pchan2chan_nr(GSM_PCHAN_PDCH, ts->nr, 0);
+	dh->chan_nr = gsm_pchan2chan_nr(GSM_PCHAN_TCH_F, ts->nr, 0);
 
 	DEBUGP(DRSL, "%s IPAC PDCH %sACT\n", gsm_ts_name(ts),
 		act ? "" : "DE");
diff --git a/src/libcommon/gsm_data_shared.c b/src/libcommon/gsm_data_shared.c
index d792f3b..2696273 100644
--- a/src/libcommon/gsm_data_shared.c
+++ b/src/libcommon/gsm_data_shared.c
@@ -644,11 +644,14 @@
 
 	switch (pchan) {
 	case GSM_PCHAN_TCH_F:
-	case GSM_PCHAN_PDCH:
 	case GSM_PCHAN_TCH_F_PDCH:
 		OSMO_ASSERT(lchan_nr == 0);
 		cbits = 0x01;
 		break;
+	case GSM_PCHAN_PDCH:
+		OSMO_ASSERT(lchan_nr == 0);
+		cbits = RSL_CHAN_OSMO_PDCH >> 3;
+		break;
 	case GSM_PCHAN_TCH_H:
 		OSMO_ASSERT(lchan_nr < 2);
 		cbits = 0x02;