diff --git a/src/gsmtap_util.c b/src/gsmtap_util.c
index 2fb18a4..a4fe2d9 100644
--- a/src/gsmtap_util.c
+++ b/src/gsmtap_util.c
@@ -86,6 +86,12 @@
 	case RSL_CHAN_OSMO_PDCH:
 		ret = GSMTAP_CHANNEL_PDCH;
 		break;
+	case RSL_CHAN_OSMO_CBCH4:
+		ret = GSMTAP_CHANNEL_CBCH51;
+		break;
+	case RSL_CHAN_OSMO_CBCH8:
+		ret = GSMTAP_CHANNEL_CBCH52;
+		break;
 	}
 
 	if (link_id & 0x40)