diff --git a/openbsc/include/openbsc/abis_rsl.h b/openbsc/include/openbsc/abis_rsl.h
index 4f9d483d9..f95fa312a 100644
--- a/openbsc/include/openbsc/abis_rsl.h
+++ b/openbsc/include/openbsc/abis_rsl.h
@@ -29,6 +29,7 @@
 struct gsm_bts;
 struct gsm_lchan;
 struct gsm_subscriber;
+struct gsm_bts_trx_ts;
 
 
 int rsl_bcch_info(struct gsm_bts_trx *trx, u_int8_t type,