wp_list_page and Blog

Hello,

So I had a hybrid website, where I was using WordPress only for the blog. Now I’m trying to integrate everything into WordPress.

My problem:
I’ve set up a page as my front page, the blog posts appear on the blog page. But now, my main menu which is using wp_list_pages will show the current_item_page class when you on a page, on its child or on the blog main page. But once you’re on blog post page (in order to read the comments for example) the “current_item_page” doesn’t appears anymore on the blog link.

Is this clear? Do you have in idea how I could solve thiS?
Thanks

Yann