If you’re among the many ravenous gamers looking to explore the wasteland next week on your Xbox One, you may want to take heed of Bethesda’s official warning. If you pre-ordered and pre-installed Fallout 4 on the Xbox One, you might not have the right version installed.

Bethesda had players download a placeholder file when they initially pre-ordered the game. That file is not the game itself, and it will not work on launch day. You’ll have to uninstall that file and install the new one.

There’s a caveat here. If you have Instant-On enabled on your Xbox One and your console automatically downloads updates, you should be ready to rock. If not, read on.

If you want to pre-load Fallout 4, Bethesda has issued some official intructions.

  1. Navigate to My Games & Apps.
  2. Find the title’s tile in Games.
  3. With the tile highlighted, press the [Menu] button on your controller.
  4. Select Manage Game.
  5. In the Manage Game screen, select the storage device the game is currently installed to.
  6. Select Uninstall.
  7. Once the game has uninstalled, return to My Games & Apps.
  8. Scroll right to the “Ready to Install” section under Games.
  9. Highlight the title’s tile.
  10. Press [A] to select.
  11. Choose Install.

Essentially, you’re uninstalling and reinstalling the game. That means you’ll remove the placeholder install and installing the real thing.

Fallout 4 launches for the PC, PlayStation 4 and Xbox One on November 10, 2015.