In progressive systemic scleroderma, a disease of protean manifestations, involvement of the gastrointestinal tract is noted infrequently in patients who are asymptomatic, and is rarely fatal. We report the case of a 65-year-old woman who was admitted for ascitis related to a non A, non B cirrhosis. The patient presented with bacterial peritonitis due to colonic perforation by fecal impaction associated with sclerodermic involvement. Pathologic study of the resected colon showed that the true muscularis was very atrophic and fibrotic, characteristic of scleroderma. To our knowledge, this cause of ascitic fluid infection has not been previously reported.