A pharmaceutical aqueous formulation comprising 1-(4-{[4-(dimethylamino)piperidin-1-yl]carbonyl}phenyl)-3-[4-(4,6-dimorpholin-4-yl-1,3,5-triazin-2-yl)phenyl]urea, or a pharmaceutically acceptable organic or inorganic acid salt thereof, a pharmaceutically acceptable organic or inorganic acid, a pharmaceutically acceptable beta- or gamma-cyclodextrin and water, wherein 1-(4-{[4-(dimethylamino)piperidin-1-yl]carbonyl}phenyl)-3-[4-(4,6-dimorpholin-4-yl-1,3,5-triazin-2-yl)phenyl]urea is present at a solution concentration of at least 6 mg/ml and wherein sufficient of the pharmaceutically acceptable organic or inorganic acid and pharmaceutically acceptable beta- or gamma-cyclodextrin are present to provide a clear solution, with the proviso that the organic or inorganic acid (including a salt thereof) is not a sulphonic acid.