In the 1990s, many left-wing parties abandoned their traditional economic policies and adopted more pro-market economic stances. Central and Eastern Europe offers a useful context to explore the impact of these policies on the electoral fortunes of the left-wing parties that adopted them. Although rewarded at first with electoral victories, the adaptation of pro-market positions had a less straightforward impact on the left-wing parties’ electoral fortunes in the long run. CHES data on party positions and ESS survey data on party support show that pro-market left parties obtain reduced support; this effect is particularly pronounced among the economically vulnerable occupational groups. In countries with more pro-market left parties, these groups have a higher propensity to vote for right-wing parties. These findings highlight important parallels between the dynamics of Western and Central and Eastern European party systems.