add GSM_LCHAN_PDTCH
diff --git a/include/osmocom/gsm/gsm_utils.h b/include/osmocom/gsm/gsm_utils.h
index c9a3101..6d31672 100644
--- a/include/osmocom/gsm/gsm_utils.h
+++ b/include/osmocom/gsm/gsm_utils.h
@@ -143,6 +143,7 @@
 	GSM_LCHAN_TCH_H,
 	GSM_LCHAN_UNKNOWN,
 	GSM_LCHAN_CCCH,
+	GSM_LCHAN_PDTCH,
 	_GSM_LCHAN_MAX
 };