diff --git a/drivers/staging/comedi/comedilib.h b/drivers/staging/comedi/comedilib.h
index 00414359138d72a7d3d8bd5a156d0b41f4526afa..23ec58d2e2395332b843c586cd02b5982d9f30d8 100644
--- a/drivers/staging/comedi/comedilib.h
+++ b/drivers/staging/comedi/comedilib.h
@@ -33,7 +33,4 @@ int comedi_dio_bitfield(void *dev, unsigned int subdev, unsigned int mask,
 int comedi_find_subdevice_by_type(void *dev, int type, unsigned int subd);
 int comedi_get_n_channels(void *dev, unsigned int subdevice);
 
-/* internal to kcomedilb */
-int comedi_do_insn(void *dev, struct comedi_insn *insn);
-
 #endif
diff --git a/drivers/staging/comedi/kcomedilib/kcomedilib_main.c b/drivers/staging/comedi/kcomedilib/kcomedilib_main.c
index 7cb29f2bc862bb17f2d21dc258b5f124e4585c8d..d27de93ff4dd107279c52479700452970fd34879 100644
--- a/drivers/staging/comedi/kcomedilib/kcomedilib_main.c
+++ b/drivers/staging/comedi/kcomedilib/kcomedilib_main.c
@@ -84,7 +84,7 @@ EXPORT_SYMBOL(comedi_close);
  *	COMEDI_INSN
  *	perform an instruction
  */
-int comedi_do_insn(void *d, struct comedi_insn *insn)
+static int comedi_do_insn(void *d, struct comedi_insn *insn)
 {
 	struct comedi_device *dev = (struct comedi_device *)d;
 	struct comedi_subdevice *s;