An agent for treating keratin-containing fibers, in particular human hair, containing, in a cosmetically acceptable carrier, (a) at least one non-ionic, propylene oxide-modified starch, wherein the non-ionic, propylene oxide-modified starch has an average molecular weight (weight-average) of from 700 to 1000 kDa, and wherein the non-ionic, propylene oxide-modified starch is contained in an amount of from 0.1 wt.% to 10 wt.% based on the weight of the agent, and (b) at least one film-forming anionic and/or setting anionic polymer comprising at least one structural unit of formula and at least one structural unit of formula, in which R 1 and R 2 represent, independently of one another, a hydrogen atom or a methyl group, with the proviso that R 1 and R 2 do not simultaneously represent a methyl group, R 3 represents a hydrogen atom or a methyl group, R 4 represents a carbamoyl group, a linear or branched (C 4 to C 12)-alkylaminocarbonyl group, a linear or branched (C 4 to C 12)-acylaminoethyl-aminocarbonyl group, a linear or branched (C 4 to C 12)-acylaminopropyl-aminocarbonyl group, a linear or branched (C 4 to C 12)-alkoxycarbonyl group, a linear or branched (C 4 to C 12)-acylaminoethyl-oxycarbonyl group, a linear or branched (C 4 to C 12)-acylaminopropyl-oxycarbonyl group, a linear or branched (C 2 to C 12)-acyloxy group, A 1 represents a hydroxy group or an organic functional group having at least one sulfonic acid group that is bound to the structural fragment by an oxygen atom or an NH group. (a) at least one non-ionic, propylene oxide-modified starch, wherein the non-ionic, propylene oxide-modified starch has an average molecular weight (weight-average) of from 700 to 1000 kDa, and wherein the non-ionic, propylene oxide-modified starch is contained in an amount of from 0.1 wt.% to 10 wt.% based on the weight of the agent, (b) at least one film-forming anionic and/or setting anionic polymer comprising at least one structural unit of formula and at least one structural unit of formula, in which R 1 and R 2 represent, independently of one another, a hydrogen atom or a methyl group, with the proviso that R 1 and R 2 do not simultaneously represent a methyl group, R 3 represents a hydrogen atom or a methyl group, R 4 represents a carbamoyl group, a linear or branched (C 4 to C 12)-alkylaminocarbonyl group, a linear or branched (C 4 to C 12)-acylaminoethyl-aminocarbonyl group, a linear or branched (C 4 to C 12)-acylaminopropyl-aminocarbonyl group, a linear or branched (C 4 to C 12)-alkoxycarbonyl group, a linear or branched (C 4 to C 12)-acylaminoethyl-oxycarbonyl group, a linear or branched (C 4 to C 12)-acylaminopropyl-oxycarbonyl group, a linear or branched (C 2 to C 12)-acyloxy group, A 1 represents a hydroxy group or an organic functional group having at least one sulfonic acid group that is bound to the structural fragment by an oxygen atom or an NH group. R 1 and R 2 represent, independently of one another, a hydrogen atom or a methyl group, with the proviso that R 1 and R 2 do not simultaneously represent a methyl group, R 3 represents a hydrogen atom or a methyl group, R 4 represents a carbamoyl group, a linear or branched (C 4 to C 12)-alkylaminocarbonyl group, a linear or branched (C 4 to C 12)-acylaminoethyl-aminocarbonyl group, a linear or branched (C 4 to C 12)-acylaminopropyl-aminocarbonyl group, a linear or branched (C 4 to C 12)-alkoxycarbonyl group, a linear or branched (C 4 to C 12)-acylaminoethyl-oxycarbonyl group, a linear or branched (C 4 to C 12)-acylaminopropyl-oxycarbonyl group, a linear or branched (C 2 to C 12)-acyloxy group, A 1 represents a hydroxy group or an organic functional group having at least one sulfonic acid group that is bound to the structural fragment by an oxygen atom or an NH group.