Import CAD File : Circles smoothness

Hi ,

I'm trying to import a dxf file into Revit 2016 and the circles are drawn like squares . I know that if I change the scale , the imported file will be displayed correctly , but if I do this it will not fit into the Revit sheet. The drawing in Autocad is made near (0,0,0) so it's not the distance problem . Is there a way to fix the circles smoothness?

Thank you