diff --git a/include/osmocom/core/gsmtap_util.h b/include/osmocom/core/gsmtap_util.h
index 36cbf53..5609381 100644
--- a/include/osmocom/core/gsmtap_util.h
+++ b/include/osmocom/core/gsmtap_util.h
@@ -12,6 +12,10 @@
 
 uint8_t chantype_rsl2gsmtap(uint8_t rsl_chantype, uint8_t rsl_link_id);
 
+struct msgb *gsmtap_makemsg_ex(uint8_t type, uint16_t arfcn, uint8_t ts, uint8_t chan_type,
+			    uint8_t ss, uint32_t fn, int8_t signal_dbm,
+			    uint8_t snr, const uint8_t *data, unsigned int len);
+
 struct msgb *gsmtap_makemsg(uint16_t arfcn, uint8_t ts, uint8_t chan_type,
 			    uint8_t ss, uint32_t fn, int8_t signal_dbm,
 			    uint8_t snr, const uint8_t *data, unsigned int len);
@@ -40,6 +44,11 @@
 
 int gsmtap_sendmsg(struct gsmtap_inst *gti, struct msgb *msg);
 
+int gsmtap_send_ex(struct gsmtap_inst *gti, uint8_t type, uint16_t arfcn, uint8_t ts,
+		uint8_t chan_type, uint8_t ss, uint32_t fn,
+		int8_t signal_dbm, uint8_t snr, const uint8_t *data,
+		unsigned int len);
+
 int gsmtap_send(struct gsmtap_inst *gti, uint16_t arfcn, uint8_t ts,
 		uint8_t chan_type, uint8_t ss, uint32_t fn,
 		int8_t signal_dbm, uint8_t snr, const uint8_t *data,