diff --git a/include/osmocom/gprs/gprs_ns2.h b/include/osmocom/gprs/gprs_ns2.h
index 1bf8c7f..07e6c45 100644
--- a/include/osmocom/gprs/gprs_ns2.h
+++ b/include/osmocom/gprs/gprs_ns2.h
@@ -215,6 +215,8 @@
 					const struct osmo_sockaddr *remote,
 					struct gprs_ns2_nse *nse,
 					uint16_t nsvci);
+void gprs_ns2_ip_bind_set_sns_weight(struct gprs_ns2_vc_bind *bind,
+				     uint8_t signalling, uint8_t data);
 
 void gprs_ns2_free_bind(struct gprs_ns2_vc_bind *bind);
 void gprs_ns2_free_binds(struct gprs_ns2_inst *nsi);