diff --git a/include/osmocom/msc/msc_a.h b/include/osmocom/msc/msc_a.h
index bb7b8f9..5256744 100644
--- a/include/osmocom/msc/msc_a.h
+++ b/include/osmocom/msc/msc_a.h
@@ -40,9 +40,13 @@
 
 #define MSC_A_USE_LOCATION_UPDATING	"lu"
 #define MSC_A_USE_CM_SERVICE_CC	"cm_service_cc"
+#define MSC_A_USE_CM_SERVICE_GCC	"cm_service_gcc"
+#define MSC_A_USE_CM_SERVICE_BCC	"cm_service_bcc"
 #define MSC_A_USE_CM_SERVICE_SMS	"cm_service_sms"
 #define MSC_A_USE_CM_SERVICE_SS	"cm_service_ss"
 #define MSC_A_USE_PAGING_RESPONSE	"paging-response"
+#define MSC_A_USE_GCC		"gcc"
+#define MSC_A_USE_BCC		"bcc"
 #define MSC_A_USE_CC		"cc"
 #define MSC_A_USE_SMS		"sms"
 #define MSC_A_USE_SMS_MMTS	"sms_mmts"
diff --git a/include/osmocom/msc/transaction.h b/include/osmocom/msc/transaction.h
index bc6c316..356bd6c 100644
--- a/include/osmocom/msc/transaction.h
+++ b/include/osmocom/msc/transaction.h
@@ -43,6 +43,8 @@
 };
 
 enum trans_type {
+	TRANS_GCC = GSM48_PDISC_GROUP_CC,
+	TRANS_BCC = GSM48_PDISC_BCAST_CC,
 	TRANS_CC = GSM48_PDISC_CC,
 	TRANS_SMS = GSM48_PDISC_SMS,
 	TRANS_USSD = GSM48_PDISC_NC_SS,
@@ -178,6 +180,10 @@
 static inline int trans_log_subsys(enum trans_type type)
 {
 	switch (type) {
+	case TRANS_GCC:
+		return DGCC;
+	case TRANS_BCC:
+		return DBCC;
 	case TRANS_CC:
 	case TRANS_SILENT_CALL:
 		return DCC;