Although national flags arguably reflect a unified nation, support for a particular flag design may vary across ideological cleavages within the electorate. Here, we examined the impact of system-challenging and system-justifying ideologies, as well as political party support, on support for flag-change in a large (N = 13,559) nationally representative sample of New Zealand adults. As hypothesized, systemjustifying ideologies (e.g., conservatism, right-wing authoritarianism, historical negation, and symbolic exclusion) correlated negatively with flag change support, whereas system-challenging ideologies (e.g., support for multiculturalism) correlated positively with support for change. Yet, consistent with an identity politics perspective, support for the National Party-the center-right/conservative party in New Zealand whose leader advocated change-correlated positively (rather than negatively) with support for changing the flag. These results demonstrate the countervailing effects of system-justifying and system-challenging ideologies on support for change, and identify a boundary condition of conservatives' opposition to change (namely, party support).