A mixed powder or mixed granule for use in detergent formulations for machine dishwashing contains the following components: a) from 10 to 95% by weight of a copolymer of a1) from 50 to 93 mol % of acrylic acid and/or of a water-soluble salt of acrylic acid, a2) from 5 to 30 mol % of methacrylic acid and/or of a water-soluble salt of methacrylic acid, and a3) from 2 to 20 mol % of at least one nonionic monomer, wherein monomers a1) to a3) are copolymerized in a random or block manner, b) from 5 to 80% by weight of a complexing agent selected from the group consisting of a glycine-N,N-diacetic acid derivative and glutamic acid N,N-diacetic acid and salts thereof, c) from 0 to 20% by weight of a polyethylene glycol, of a nonionic surfactant or of a mixture thereof.