diff --git a/src/chan_alloc.c b/src/chan_alloc.c
index ca86908..4ef5ff9 100644
--- a/src/chan_alloc.c
+++ b/src/chan_alloc.c
@@ -27,6 +27,7 @@
 
 #include <openbsc/gsm_data.h>
 #include <openbsc/chan_alloc.h>
+#include <openbsc/abis_nm.h>
 
 struct gsm_bts_trx_ts *ts_c0_alloc(struct gsm_bts *bts,
 				   enum gsm_phys_chan_config pchan)
@@ -46,6 +47,14 @@
 	return ts;
 }
 
+static const enum abis_nm_chan_comb chcomb4pchan[] = {
+	[GSM_PCHAN_CCCH]	= NM_CHANC_mainBCCH,
+	[GSM_PCHAN_CCCH_SDCCH4]	= NM_CHANC_BCCCHComb,
+	[GSM_PCHAN_TCH_F]	= NM_CHANC_TCHFull,
+	[GSM_PCHAN_TCH_H]	= NM_CHANC_TCHHalf,
+	[GSM_PCHAN_SDCCH8_SACCH8C] = NM_CHANC_SDCCH,
+	/* FIXME: bounds check */
+};
 
 /* Allocate a logical channel (TS) */
 struct gsm_bts_trx_ts *ts_alloc(struct gsm_bts *bts,
@@ -58,6 +67,8 @@
 			struct gsm_bts_trx_ts *ts = &trx->ts[j];
 			if (ts->pchan == GSM_PCHAN_NONE) {
 				ts->pchan = pchan;
+				/* set channel attribute on OML */
+				abis_nm_set_channel_attr(ts, chcomb4pchan[pchan]);
 				return ts;
 			}
 		}