diff --git a/impl/extension/rest/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConstraintViolationExceptionMapper.java b/impl/extension/rest/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConstraintViolationExceptionMapper.java
index aa3c6f7..88c746e 100644
--- a/impl/extension/rest/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConstraintViolationExceptionMapper.java
+++ b/impl/extension/rest/src/main/java/br/gov/frameworkdemoiselle/internal/implementation/ConstraintViolationExceptionMapper.java
@@ -69,7 +69,10 @@ public class ConstraintViolationExceptionMapper implements ExceptionMapper<Const
 
 		getLogger().fine(getBundle().getString("mapping-violations", status, failed.getViolations().toString()));
 
-		return Response.status(status).entity(failed.getViolations()).build();
+		Object entity = failed.getViolations();
+		String mediaType = failed.getMediaType();
+
+		return Response.status(status).entity(entity).type(mediaType).build();
 	}
 
 	private ResourceBundle getBundle() {
--
libgit2 0.21.2