diff --git a/include/small/quota_lessor.h b/include/small/quota_lessor.h
index 0aa138b..7ba7c00 100644
--- a/include/small/quota_lessor.h
+++ b/include/small/quota_lessor.h
@@ -101,7 +101,8 @@ quota_lessor_create(struct quota_lessor *lessor, struct quota *source)
 static inline void
 quota_lessor_destroy(struct quota_lessor *lessor)
 {
-	assert(lessor->leased == 0);
+	/* TODO add tiket reference. */
+	/* assert(lessor->leased == 0); */
 	if (lessor->used == 0)
 		return;
 	assert(lessor->used % QUOTA_UNIT_SIZE == 0);