diff --git a/api/Common.h b/api/Common.h
index 9b28f40a..bda2e879 100644
--- a/api/Common.h
+++ b/api/Common.h
@@ -175,8 +175,8 @@ uint16_t makeWord(byte h, byte l);
 
 #define word(...) makeWord(__VA_ARGS__)
 
-unsigned long pulseIn(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
-unsigned long pulseInLong(uint8_t pin, uint8_t state, unsigned long timeout = 1000000L);
+unsigned long pulseIn(pin_size_t pin, uint8_t state, unsigned long timeout = 1000000L);
+unsigned long pulseInLong(pin_size_t pin, uint8_t state, unsigned long timeout = 1000000L);
 
 void tone(uint8_t _pin, unsigned int frequency, unsigned long duration = 0);
 void noTone(uint8_t _pin);