Workaholism is characterized by a state of mind in which employees work excessively and compulsively. This study aimed to evaluate the psychometric properties of two versions of the Dutch Work Addiction Scale (DUWAS-16 and DUWAS 10) among 571 workers in Brazil. A confirmatory factor analysis CFA of the DUWAS-16 confirmed the two factor structure (Working Excessively and Working Compulsively), but a one-dimensional structure (Addiction) also fitted the data well. The same applied for the DUWAS-10. In sum: the results indicated that DUWAS-10 could be considered slightly superior to DUWAS-16 to evaluate both dimensions of workaholism in the Brazilian context (download paper).