diff --git a/openbsc/include/openbsc/abis_nm.h b/openbsc/include/openbsc/abis_nm.h
index 45307e3..1b6a8fe 100644
--- a/openbsc/include/openbsc/abis_nm.h
+++ b/openbsc/include/openbsc/abis_nm.h
@@ -164,7 +164,8 @@
 	EVT_STATECHG_ADM,
 };
 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);
 
 const char *nm_opstate_name(u_int8_t os);
 const char *nm_avail_name(u_int8_t avail);
diff --git a/openbsc/src/abis_nm.c b/openbsc/src/abis_nm.c
index c78ee56..42f610d 100644
--- a/openbsc/src/abis_nm.c
+++ b/openbsc/src/abis_nm.c
@@ -678,7 +678,7 @@
 	new_state = *nm_state;
 	new_state.administrative = adm_state;
 
-	rc = nm_state_event(EVT_STATECHG_ADM, obj_class, obj, nm_state, &new_state);
+	rc = nm_state_event(EVT_STATECHG_ADM, obj_class, obj, nm_state, &new_state, obj_inst);
 
 	nm_state->administrative = adm_state;
 
@@ -732,7 +732,7 @@
 		/* Update the operational state of a given object in our in-memory data
  		* structures and send an event to the higher layer */
 		void *obj = objclass2obj(bts, foh->obj_class, &foh->obj_inst);
-		rc = nm_state_event(EVT_STATECHG_OPER, foh->obj_class, obj, nm_state, &new_state);
+		rc = nm_state_event(EVT_STATECHG_OPER, foh->obj_class, obj, nm_state, &new_state, &foh->obj_inst);
 		nm_state->operational = new_state.operational;
 		nm_state->availability = new_state.availability;
 		if (nm_state->administrative == 0)
diff --git a/openbsc/src/bs11_config.c b/openbsc/src/bs11_config.c
index a7493b4..d8819d3 100644
--- a/openbsc/src/bs11_config.c
+++ b/openbsc/src/bs11_config.c
@@ -697,7 +697,8 @@
 }
 
 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_ins)
 {
 	return 0;
 }
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;
diff --git a/openbsc/src/ipaccess/ipaccess-config.c b/openbsc/src/ipaccess/ipaccess-config.c
index 075a264..0dab9cb 100644
--- a/openbsc/src/ipaccess/ipaccess-config.c
+++ b/openbsc/src/ipaccess/ipaccess-config.c
@@ -392,7 +392,8 @@
 }
 
 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)
 {
 	if (evt == EVT_STATECHG_OPER &&
 	    obj_class == NM_OC_RADIO_CARRIER &&