The present invention relates to a pharmaceutical aqueous formulation comprising -(4-{[4-(dimethylamino)piperidin-1-yl]carbonyl}phenyl)-3-[4-(4,6-dimorpholin-4-yl-,3,5-triazin-2-yl)phenyl]urea, or a pharmaceutically acceptable salt thereof, that is a clear solution. Such a formulation is particularly suitable for intravenous or parenteral administration to a patient.