diff --git a/src/gb/gprs_bssgp_internal.h b/src/gb/gprs_bssgp_internal.h
index 2ada027..5022d32 100644
--- a/src/gb/gprs_bssgp_internal.h
+++ b/src/gb/gprs_bssgp_internal.h
@@ -5,3 +5,5 @@
 
 extern bssgp_bvc_send bssgp_ns_send;
 extern void *bssgp_ns_send_data;
+
+int bssgp_rx_rim(struct msgb *msg, struct tlv_parsed *tp, uint16_t bvci);