diff --git a/openbsc/include/openbsc/gsm_data_shared.h b/openbsc/include/openbsc/gsm_data_shared.h
index 0b6bf60..e46647c 100644
--- a/openbsc/include/openbsc/gsm_data_shared.h
+++ b/openbsc/include/openbsc/gsm_data_shared.h
@@ -332,7 +332,14 @@
 #endif
 };
 
-#define TS_F_PDCH_MODE	0x1000
+enum {
+	TS_F_PDCH_ACTIVE =		0x1000,
+	TS_F_PDCH_ACT_PENDING =		0x2000,
+	TS_F_PDCH_DEACT_PENDING =	0x4000,
+	TS_F_PDCH_PENDING_MASK =	0x6000 /*<
+			TS_F_PDCH_ACT_PENDING | TS_F_PDCH_DEACT_PENDING */
+} gsm_bts_trx_ts_flags;
+
 /* One Timeslot in a TRX */
 struct gsm_bts_trx_ts {
 	struct gsm_bts_trx *trx;
diff --git a/openbsc/src/libbsc/abis_rsl.c b/openbsc/src/libbsc/abis_rsl.c
index 59176df..338c00a 100644
--- a/openbsc/src/libbsc/abis_rsl.c
+++ b/openbsc/src/libbsc/abis_rsl.c
@@ -472,7 +472,7 @@
 
 	/* if channel is in PDCH mode, deactivate PDCH first */
 	if (lchan->ts->pchan == GSM_PCHAN_TCH_F_PDCH
-	    && (lchan->ts->flags & TS_F_PDCH_MODE)) {
+	    && (lchan->ts->flags & TS_F_PDCH_ACTIVE)) {
 		/* store activation type and handover reference */
 		lchan->dyn_pdch.act_type = act_type;
 		lchan->dyn_pdch.ho_ref = ho_ref;
@@ -1203,7 +1203,7 @@
 
 static int rsl_rx_pdch_act_ack(struct msgb *msg)
 {
-	msg->lchan->ts->flags |= TS_F_PDCH_MODE;
+	msg->lchan->ts->flags |= TS_F_PDCH_ACTIVE;
 
 	/* We have activated PDCH, so now the channel is available again. */
 	do_lchan_free(msg->lchan);
@@ -1213,7 +1213,7 @@
 
 static int rsl_rx_pdch_deact_ack(struct msgb *msg)
 {
-	msg->lchan->ts->flags &= ~TS_F_PDCH_MODE;
+	msg->lchan->ts->flags &= ~TS_F_PDCH_ACTIVE;
 
 	rsl_chan_activate_lchan(msg->lchan, msg->lchan->dyn_pdch.act_type,
 				msg->lchan->dyn_pdch.ho_ref);
diff --git a/openbsc/src/libbsc/bsc_vty.c b/openbsc/src/libbsc/bsc_vty.c
index b0f2f62..578b005 100644
--- a/openbsc/src/libbsc/bsc_vty.c
+++ b/openbsc/src/libbsc/bsc_vty.c
@@ -919,7 +919,7 @@
 		gsm_pchan_name(ts->pchan), gsm_ts_tsc(ts));
 	if (ts->pchan == GSM_PCHAN_TCH_F_PDCH)
 		vty_out(vty, " (%s mode)",
-			ts->flags & TS_F_PDCH_MODE ? "PDCH" : "TCH/F");
+			ts->flags & TS_F_PDCH_ACTIVE ? "PDCH" : "TCH/F");
 	vty_out(vty, "%s", VTY_NEWLINE);
 	vty_out(vty, "  NM State: ");
 	net_dump_nmstate(vty, &ts->mo.nm_state);