diff --git a/src/transform/bound_array_accessors.cc b/src/transform/bound_array_accessors.cc
index 5eecfec70c..d4b7bed5eb 100644
--- a/src/transform/bound_array_accessors.cc
+++ b/src/transform/bound_array_accessors.cc
@@ -69,7 +69,12 @@ ast::ArrayAccessorExpression* BoundArrayAccessors::Transform(
 
   if (size == 0) {
     if (is_arr) {
-      auto* arr_len = b.Call("arrayLength", ctx->Clone(expr->array()));
+      // Call Cloneable::Clone() instead of CloneContext::Clone() to ensure the
+      // AST node is duplicated. CloneContext::Clone() will ensure that repeated
+      // calls with the same pointer return the *same* cloned node - in this
+      // case we actually want two copies.
+      auto* arr = static_cast<ast::Expression*>(expr->array()->Clone(ctx));
+      auto* arr_len = b.Call("arrayLength", arr);
       auto* limit = b.Sub(arr_len, b.Expr(1u));
       new_idx = b.Call("min", b.Construct<u32>(ctx->Clone(old_idx)), limit);
     } else {