diff --git a/src/others/fragment/lv_fragment.c b/src/others/fragment/lv_fragment.c
index 71421a3fd5..e72413a80a 100644
--- a/src/others/fragment/lv_fragment.c
+++ b/src/others/fragment/lv_fragment.c
@@ -26,7 +26,7 @@ lv_fragment_t * lv_fragment_create(const lv_fragment_class_t * cls, void * args)
 {
     LV_ASSERT_NULL(cls);
     LV_ASSERT_NULL(cls->create_obj_cb);
-    LV_ASSERT(cls->instance_size > 0);
+    LV_ASSERT(cls->instance_size >= sizeof(lv_fragment_t));
     lv_fragment_t * instance = lv_malloc(cls->instance_size);
     lv_memzero(instance, cls->instance_size);
     instance->cls = cls;