diff --git a/inc/gpio_sys.h b/inc/gpio_sys.h
index 6bebd45..3946a17 100644
--- a/inc/gpio_sys.h
+++ b/inc/gpio_sys.h
@@ -12,7 +12,7 @@ enum pin_state {
 };
 
 struct gpio_sys {
-    enum pin_state pin;
+    int pin;
     enum direction direction;
 };