Nighthawk RAXE500 and printers

Greetings, apologies if this is covered in another thread.  I have a basic question. My nighthawk raxe500 is using DHCP. I successfully added a HP LJ-1320NW printer to the network by resetting to the factory settings and then adding a new printer. The network sees it, I can print a test page, etc., etc.

But if the network router is restarted, the printer is offline. I'm assuming this is because the printer was assigned IP addresses (x) when I set it up, and when the network restarted it received a new IP address.

So the question is: if I want to keep using DHCP, will an address reservation (Advanced - Setup - LAN Setup) do the trick? Reserving the same address for the printer each time should do it... yes?

Thanks