From the Wire Library section of https://www.arduino.cc/en/Tutorial/LibraryExamples:
For all Arduino boards, BUT Arduino DUE.
To me, that reads as saying the Wire library is not compatible with Due but I'm pretty sure that's wrong because Arduino SAM Boards does contain a Wire library, the example sketches are functionally identical to those in the examples page, and the Wire library reference page does mention the Due.
Originally reported at http://forum.arduino.cc/index.php?topic=510365