diff --git a/scst/src/scst_lib.c b/scst/src/scst_lib.c
index 3bf505191..64424306f 100644
--- a/scst/src/scst_lib.c
+++ b/scst/src/scst_lib.c
@@ -2753,13 +2753,16 @@ out:
 	return;
 }
 
-/* The activity supposed to be suspended and scst_mutex held */
 void scst_report_luns_changed(struct scst_acg *acg)
 {
 	struct scst_session *sess;
 
 	TRACE_ENTRY();
 
+	/* To protect acg_sess_list */
+	scst_assert_activity_suspended();
+	lockdep_assert_held(&scst_mutex);
+
 	TRACE_DBG("REPORTED LUNS DATA CHANGED (acg %s)", acg->acg_name);
 
 	list_for_each_entry(sess, &acg->acg_sess_list, acg_sess_list_entry) {