diff --git a/openbsc/src/bsc_init.c b/openbsc/src/bsc_init.c
index 38f5dfb..77446a2 100644
--- a/openbsc/src/bsc_init.c
+++ b/openbsc/src/bsc_init.c
@@ -401,7 +401,8 @@
 
 /* Callback function to be called whenever we get a GSM 12.21 state change event */
 int nm_state_event(enum nm_evt evt, u_int8_t obj_class, void *obj,
-		   struct gsm_nm_state *old_state, struct gsm_nm_state *new_state)
+		   struct gsm_nm_state *old_state, struct gsm_nm_state *new_state,
+		   struct abis_om_obj_inst *obj_inst)
 {
 	struct gsm_bts *bts;
 	struct gsm_bts_trx *trx;