Civ:BE not containing mouse on multiple monitors

I've been playing Civilization: Beyond Earth on a PC with two monitors, with the game running on the left monitor. However, the cursor isn't constrained by the right side of the left monitor, which makes it irritating to scroll across the map. I'm running it in fullscreen, which has generally worked for all other games I've played (including Civ V). I haven't found anything on this by Googling. Is this a known issue with Civ:BE?

(System specs: Windows 8.1 x64, 2 x 1920x1080 monitors, nVidia GTX 550 Ti, running game in normal (non-mantle) mode)

Solution 1:

If you go into the Interface Options section of the Options menu, you should find this option right here:

Flip it to either Fullscreen or Always, to suit your preference, and your mouse will no longer be free to wander to your other monitor.