diff --git a/wiringPi/wiringShift.c b/wiringPi/wiringShift.c
index 3682b22..c684dbb 100644
--- a/wiringPi/wiringShift.c
+++ b/wiringPi/wiringShift.c
@@ -90,7 +90,7 @@ void shiftOut (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val)
  *********************************************************************************
  */
 
-void shiftOutWithDelay (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val, uint8_t delay)
+void shiftOutWithDelay (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val, int delay)
 {
   int8_t i;
 
diff --git a/wiringPi/wiringShift.h b/wiringPi/wiringShift.h
index 79c0fa6..3d846e0 100644
--- a/wiringPi/wiringShift.h
+++ b/wiringPi/wiringShift.h
@@ -35,7 +35,7 @@ extern "C" {
 
 extern uint8_t shiftIn  (uint8_t dPin, uint8_t cPin, uint8_t order) ;
 extern void    shiftOut (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val) ;
-extern void	   shiftOutWithDelay (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val, uint8_t delay) ;
+extern void	   shiftOutWithDelay (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val, int delay) ;
 
 #ifdef __cplusplus
 }