diff --git a/include/WinStd/COM.h b/include/WinStd/COM.h
index 4995e1b7..d06b0eb4 100644
--- a/include/WinStd/COM.h
+++ b/include/WinStd/COM.h
@@ -184,7 +184,7 @@ namespace winstd
         ///
         /// \return Duplicated object handle
         ///
-        handle_type duplicate_internal(_In_ handle_type h) const override
+        T* duplicate_internal(_In_ T* h) const override
         {
             h->AddRef();
             return h;