diff --git a/src/pins.c b/src/pins.c
index 69cae33..aac042a 100644
--- a/src/pins.c
+++ b/src/pins.c
@@ -1,23 +1,24 @@
 #include <inttypes.h>
+#include <stdio.h>
 
 #include "pins.h"
 
 void setPin(volatile uint8_t *port, unsigned int pin)
 {
 	*port |= (1 << pin);
-	printf("Port %d, Pin %d set\n\r", port, pin);
+	printf("Port %d, Pin %d set\n\r", (int)port, pin);
 }
 
 void unsetPin(volatile uint8_t *port, unsigned int pin)
 {
 	*port &= ~(1 << pin);
-	printf("Port %d, Pin %d unset\n\r", port, pin);
+	printf("Port %d, Pin %d unset\n\r", (int)port, pin);
 }
 
 void togglePin(volatile uint8_t *port, unsigned int pin)
 {
 	*port ^= (1 << pin);
-	printf("Port %d, Pin %d toggled to ", port, pin);
+	printf("Port %d, Pin %d toggled to ", (int)port, pin);
 
 	if ((*port & (1 << pin)) > 0)
 		printf("on");