To be blunt about it, notwithstanding replies to the contrary, the short answer is, "Yes, of course." Declaring a loss for tax purposes is not dependent on your broker doing anything. You should be asking a real tax professional this question if any sizable amount of money is involved. Some of the "advice" you get here is extremely distorted, to say the least.
You should also ask that professional when to declare the loss, and be sure to tell him that the stock was revoked in 2011. This might save you inconvenience down the road a year or two.