Xerath Incorrect Range on Ultimate Tool-Tip [GAMEPLAY]

I've noticed that if I hover my cursor over Xerath's ultimate, the range circle that appears on the game and mini-map is slightly larger than the actual range of the spell. Once I channel his ultimate, I find that the target range is about two turret-widths smaller in diameter (one turret-width smaller in radius/linear distance). This is a small difference, but will definitely lead players to make incorrect decisions about kill viability in high-pressure/fast-pace gameplay.