Target is getting hit with another lump of coal this holiday season.

The nation’s second-largest discount retailer says than an unidentified number of gift cards sold over the holidays were not properly activated. The Minneapolis chain says the number of cards affected was less than 0.1 percent of the total sold and that it will honor the affected cards.

Customers they can bring faulty cards to any Target service desk or call 1-800-544-2943 for help.

The snafu comes less than two weeks after Target was hit with a massive data security breach that affected as many as 40 million debit and credit card holders.