diff --git a/include/xo/allocutil/IObject.hpp b/include/xo/allocutil/IObject.hpp
index 2104888..c6f9611 100644
--- a/include/xo/allocutil/IObject.hpp
+++ b/include/xo/allocutil/IObject.hpp
@@ -96,6 +96,8 @@ namespace xo {
         virtual std::size_t _forward_children(gc::IAlloc * gc) = 0;
     };
 
+    static_assert(std::is_destructible_v<IObject>, "IObject must be destructible");
+
     /** @class Cpof
      *  @brief argument to operator new used for garbage collector evacuation phase
      *
diff --git a/include/xo/allocutil/ObjectVisitor.hpp b/include/xo/allocutil/ObjectVisitor.hpp
index 1719ef7..276df55 100644
--- a/include/xo/allocutil/ObjectVisitor.hpp
+++ b/include/xo/allocutil/ObjectVisitor.hpp
@@ -34,7 +34,7 @@ namespace xo {
          **/
         template <typename T>
         class ObjectVisitor {
-            //void forward_children(T & target, IAlloc * gc) { (void)target; (void)gc; }
+            void forward_children(T & target, IAlloc * gc) { (void)target; (void)gc; }
         };
 
 #define XO_TRIVIAL_OBJECT_VISITOR(TYPE)                       \