diff --git a/src/hb-array.hh b/src/hb-array.hh
index fe1639a84..18bcd5225 100644
--- a/src/hb-array.hh
+++ b/src/hb-array.hh
@@ -189,12 +189,14 @@ struct hb_array_t : hb_iter_with_fallback_t<hb_array_t<Type>, Type&>
 
   hb_sorted_array_t<Type> qsort (int (*cmp_)(const void*, const void*))
   {
+    //static_assert (hb_enable_if (hb_is_trivially_copy_assignable(Type)), "");
     if (likely (length))
       hb_qsort (arrayZ, length, this->get_item_size (), cmp_);
     return hb_sorted_array_t<Type> (*this);
   }
   hb_sorted_array_t<Type> qsort ()
   {
+    //static_assert (hb_enable_if (hb_is_trivially_copy_assignable(Type)), "");
     if (likely (length))
       hb_qsort (arrayZ, length, this->get_item_size (), Type::cmp);
     return hb_sorted_array_t<Type> (*this);