The spacecraft arrived at the its launch pad at the Kennedy Space Center on Wednesday, and officials welcomed it with a banner reading "Go Endeavor."
The shuttle's name, however, is spelled the British way, with a "u."
It's named after the first ship commanded by 18th century British explorer James Cook.
The banner was up for about 90 minutes before being replaced by one with the correct spelling, but with photographers on hand for the arrival of the shuttle, cameras captured the mistake.
Endeavour's launch is scheduled for Aug. 7.