The present invention relates to solic pharmaceutical dosage forms comprising the drug substance 3-(2, 6-dichloro-3, 5-dimethoxy-phenyl)-1-{6-[4-(4-ethyl-piperazin-1-yl)phenylamino]-pyrimidin-4-yl}-1-methyl-urea or any pharmaceutically acceptable sait thereof. lt further relates to processes of making said solid pharmaceutical dosage forms.