diff --git a/drivers/staging/comedi/drivers/ni_660x.c b/drivers/staging/comedi/drivers/ni_660x.c
index 7755f119744d..3e01978f822b 100644
--- a/drivers/staging/comedi/drivers/ni_660x.c
+++ b/drivers/staging/comedi/drivers/ni_660x.c
@@ -28,7 +28,7 @@
  *
  * Encoders work.  PulseGeneration (both single pulse and pulse train)
  * works.  Buffered commands work for input but not output.
- * 
+ *
  * References:
  * DAQ 660x Register-Level Programmer Manual  (NI 370505A-01)
  * DAQ 6601/6602 User Manual (NI 322137B-01)