Called Shots not showing in skills menu

On Deadeye, I selected the "Called Shots" ascendency node. However, when I go in my skills menu, it doesn't show up. It was showing up yesterday after I completed my 3rd ascendency and I even equipped Sniper's mark and some other support gems in it. What did I do wrong?

Edit : I found it. When my dexterity stat fell under the requirement for sniper's mark, it simply hid it. It would be nice to have an indication that our dexterity isnt hign enough to use the skill.