diff --git a/api/Common.h b/api/Common.h
index 8d288e18..3f4df062 100644
--- a/api/Common.h
+++ b/api/Common.h
@@ -104,7 +104,7 @@ unsigned long pulseIn(pin_size_t pin, uint8_t state, unsigned long timeout);
 unsigned long pulseInLong(pin_size_t pin, uint8_t state, unsigned long timeout);
 
 void shiftOut(pin_size_t dataPin, pin_size_t clockPin, BitOrder bitOrder, uint8_t val);
-pin_size_t shiftIn(pin_size_t dataPin, pin_size_t clockPin, BitOrder bitOrder);
+uint8_t shiftIn(pin_size_t dataPin, pin_size_t clockPin, BitOrder bitOrder);
 
 void attachInterrupt(pin_size_t interruptNumber, voidFuncPtr callback, PinStatus mode);
 void attachInterruptParam(pin_size_t interruptNumber, voidFuncPtrParam callback, PinStatus mode, void* param);