WASHINGTON (AP) -- A printing error is sending people looking to call a federal phone number to order duck stamps to a phone-sex line.

The carrier card for the duck stamps transposes two numbers. So instead of listing 1-800-782-6724, it lists 1-800-872-6724. The first number spells out "1-800-STAMP24," while the second number spells out "1-800-TRAMP24."

People calling the second number are welcomed by "Intimate Connections" and enticed by a husky female voice to "talk only to the girls that turn you on," for $1.99 a minute.

At $300,000, the government says the printing error would be too expensive to correct and won't be fixed until next year's duck stamps.

Duck stamps are required to hunt migratory waterfowl. The government uses nearly all of the revenue from the $15 stamps to purchase waterfowl habitat for the National Wildlife Refuge System.

(Copyright 2008 by The Associated Press. All Rights Reserved.)