During the season of 2011, three edges of an unknown manmade feature appeared at 1.80m to the north of KV 40, on the 25th of January, the first day of the Egyptian revolution. Due to the situation, it was immediately covered with an iron door. As this structure is so close to KV 40 and as it was impossible to know whether it was just a short unfinished shaft or a real tomb, we gave it the temporary number 40b. This number is now replaced by the final designation KV 64. The KV numbers should definitely be used exclusively for real tombs or deposits and not for possible cavities and yet unascertained structures.
Check out the whole report (with several photos) from the University of Basel, with thanks to Kara Cooney for pointing it out.