diff --git a/xo-alloc/utest/Forwarding1.test.cpp b/xo-alloc/utest/Forwarding1.test.cpp
index b39c35a1..2dcb5efe 100644
--- a/xo-alloc/utest/Forwarding1.test.cpp
+++ b/xo-alloc/utest/Forwarding1.test.cpp
@@ -33,8 +33,8 @@ namespace xo {
                 void display(std::ostream & os) const final override { os << data_; }
 
                 virtual std::size_t _shallow_size() const final override { return sizeof(*this); }
-                virtual Object * _shallow_copy() const final override { return new (Cpof(Object::mm, this)) DummyObject(*this); }
-                virtual std::size_t _forward_children() final override { return _shallow_size(); }
+                virtual Object * _shallow_copy(gc::IAlloc * mm) const final override { return new (Cpof(mm, this)) DummyObject(*this); }
+                virtual std::size_t _forward_children(gc::GC * gc) final override { return _shallow_size(); }
 
             private:
                 std::array<char, 128> data_;