The invention relates to novel shapes of methyl{4,6-diamino-2-[1-(2-fluorobenzyl)-1H-pyrazolo[3,4-B]pyridine-3-yl]pyrimidin-5-yl)carbamate of the formula (I), in particular the modification I, to a method for the production thereof, to medications comprising same, and to the use thereof for treating illnesses.