Online shoppers looking to buy a United shirt were treated to a bargain after they were accidentally sold at £22 ($37) each.
The club’s official shop, operated by Kitbag.com, listed the new United shirts as part of their half-price sale by mistake.
Some fans were able to buy the shirt for less than half price at just £22, with children’s shirts on offer for just £16.50.
The sale was first spotted during United’s pre-season win over LA Galaxy before it was closed down at approximately 0700GMT.
Aware that refusing to allow the sales would be a major PR embarrassment, United confirmed they will honour discounts on all merchandise sold.
“United Direct, the Club’s Official Online Megastore, which is run by our e-commerce partner Kitbag, sent out communications which contained details of an erroneous discount code to our fans around the globe – this offer has now ended,” a statement said.
“United Direct will honour all consumer orders placed using this discount code, an approach which is fully endorsed by the Club.”