A marketing email for Dead Rising 4 contained a string of letters that some perceived to be a racial slur, prompting Microsoft to apologise.

Microsoft recently sent out a promotional email about Dead Rising 4 to Xbox Live users. The email was advertising the zombie choir, a little piano that has zombie groans and gorwls assigned to each key, letting you play and share music.

The email was titled, “NNNNGGGHHHAAAA”, a supposed zombie roar that has the same sound of the N-word, which upset some people. Microsoft followed it up with an apology by way of Larry “Major Nelson” Hryb, and promised to do “better next time.”

This is what the email looked like:

And here’s Hryb’s tweet:

Today we sent a DR4 email where a zombie roar was interpreted by many as a racial slur. We apologize and promise to do better next time. Subscribe to the VG247 newsletter Get all the best bits of VG247 delivered to your inbox every Friday! Enable JavaScript to sign up to our newsletter — / Larry Hryb / + 1m (@majornelson) November 22, 2016

Dead Rising 4 is out December 6 on PC and Xbox One.