diff --git a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.h b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.h
index 1f2bd0ff6a90..989e880a0edc 100644
--- a/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.h
+++ b/drivers/staging/comedi/drivers/addi-data/hwdrv_apci1500.h
@@ -113,52 +113,3 @@ enum {
 	APCI1500_RW_PORT_B_PATTERN_TRANSITION,
 	APCI1500_RW_PORT_B_PATTERN_MASK
 };
-
- /*----------DIGITAL INPUT----------------*/
-static int i_APCI1500_Initialisation(struct comedi_device *dev, struct comedi_subdevice *s,
-				     struct comedi_insn *insn, unsigned int *data);
-static int i_APCI1500_ConfigDigitalInputEvent(struct comedi_device *dev,
-					      struct comedi_subdevice *s,
-					      struct comedi_insn *insn,
-					      unsigned int *data);
-
-static int i_APCI1500_StartStopInputEvent(struct comedi_device *dev,
-					  struct comedi_subdevice *s,
-					  struct comedi_insn *insn, unsigned int *data);
-static int i_APCI1500_ReadMoreDigitalInput(struct comedi_device *dev,
-					   struct comedi_subdevice *s,
-					   struct comedi_insn *insn, unsigned int *data);
-
-/*----------	DIGITAL OUTPUT------------*/
-static int i_APCI1500_ConfigDigitalOutputErrorInterrupt(struct comedi_device *dev,
-							struct comedi_subdevice *s,
-							struct comedi_insn *insn,
-							unsigned int *data);
-static int i_APCI1500_WriteDigitalOutput(struct comedi_device *dev,
-					 struct comedi_subdevice *s,
-					 struct comedi_insn *insn, unsigned int *data);
-
-/*----------TIMER----------------*/
-static int i_APCI1500_ConfigCounterTimerWatchdog(struct comedi_device *dev,
-						 struct comedi_subdevice *s,
-						 struct comedi_insn *insn,
-						 unsigned int *data);
-static int i_APCI1500_StartStopTriggerTimerCounterWatchdog(struct comedi_device *dev,
-							   struct comedi_subdevice *s,
-							   struct comedi_insn *insn,
-							   unsigned int *data);
-static int i_APCI1500_ReadCounterTimerWatchdog(struct comedi_device *dev,
-					       struct comedi_subdevice *s,
-					       struct comedi_insn *insn,
-					       unsigned int *data);
-static int i_APCI1500_ReadInterruptMask(struct comedi_device *dev,
-					struct comedi_subdevice *s,
-					struct comedi_insn *insn, unsigned int *data);
-
-/*----------INTERRUPT HANDLER------*/
-static void v_APCI1500_Interrupt(int irq, void *d);
-static int i_APCI1500_ConfigureInterrupt(struct comedi_device *dev,
-					 struct comedi_subdevice *s,
-					 struct comedi_insn *insn, unsigned int *data);
-/*----------RESET---------------*/
-static int i_APCI1500_Reset(struct comedi_device *dev);