Extending Hirschman's 'Exit-Voice-Loyalty' framework, the authors distinguish between attitudinal and relational aspects of loyalty. They hypothesize that co-workers' support for voice will moderate the effect of relational, but not attitudinal loyalty on voice. In line with the study's hypotheses, multilevel analyses of survey data on 204 voice actions (concerning three issues) of 121 employees in a Dutch public sector organization showed that the effect of relational loyalty (operationalized as social relations) on voice depended on context and issue. When department members perceived serious problems, relational loyalty decreased the likelihood of voice for one of the issues. For another issue, relational loyalty increased the likelihood of voice when department norms encouraged voice. By contrast, attitudinal loyalty (operationalized as organizational commitment) had no effect on voice.