EA has accidentally misprinted CD keys on the manuals for Red Alert 3, leaving many 19 characters instead of 20 characters long.
But worry ye not, because EA has come up with a solution.
"There is currently a work-around that may allow you to bypass this issue. Since you have the first 19 characters of the code already, you can basically try guessing the last character," explains the EA customer support site, helpfully.
"To do this, simply enter your existing code, and then for the last character, try the letters A-Z, and then the numbers 0-9. You should eventually get the right combination, and be able to play the game."
If not, there's always the support number to phone. This can be found on page 28 of your manual. Oh it's not there? Well there are only 11 digits, but better try the numbers first this time.
Red Alert 3 was released on PC last Friday, and entered the UK all-formats chart at 15 this week.
We rather liked the game - particularly the campaign co-op - as our Red Alert 3 review explains.
Command & Conquer: Red alert 3 will be released for Xbox 360 on 14th November.