Provided are an aqueous liquid preparation showing improved stability of N-[5-({2-[(cyclopropylcarbonyl)amino]imidazo[1,2-b]pyridazin-6-yl}oxy)-2-methylphenyl]-1,3-dimethyl-1H-pyrazole-5-carboxamide or a salt thereof in the aqueous liquid preparation, a method of stabilizing the compound in an aqueous liquid, and a stabilizer of the compound in an aqueous liquid.An aqueous liquid preparation containing the above-mentioned compound and ethylenediaminetetraacetic acid (EDTA) or a salt thereof or a hydrate thereof； a stabilizing method of the compound in an aqueous liquid, including adding the compound and EDTA or a salt thereof or a hydrate thereof to the aqueous liquid； a stabilizer of the above-mentioned compound in an aqueous liquid, which contains EDTA or a salt thereof or a hydrate thereof； and a stabilizer of the compound in an aqueous liquid, which contains EDTA or a salt thereof or a hydrate thereof, and castor oil in combination.
