diff --git a/demo/python/info.py b/demo/python/info.py
index 15393e0..6d303d3 100755
--- a/demo/python/info.py
+++ b/demo/python/info.py
@@ -26,6 +26,8 @@ subdevice_types = {c.COMEDI_SUBD_UNUSED:"unused",
 		   c.COMEDI_SUBD_DO:"digital output",
 		   c.COMEDI_SUBD_DIO:"digital I/O",
 		   c.COMEDI_SUBD_COUNTER:"counter",
+		   c.COMEDI_SUBD_SERIAL:"serial",
+		   c.COMEDI_SUBD_PWM:"pulse width modulation",
 		   c.COMEDI_SUBD_TIMER:"timer",
 		   c.COMEDI_SUBD_MEMORY:"memory",
 		   c.COMEDI_SUBD_CALIB:"calibration",