diff --git a/src/libs/PCF8574/PCF8574.cpp b/src/libs/PCF8574/PCF8574.cpp
index bda1bd9..abfddae 100644
--- a/src/libs/PCF8574/PCF8574.cpp
+++ b/src/libs/PCF8574/PCF8574.cpp
@@ -90,7 +90,7 @@ void PCF8574::digitalReadAll(boolean array[8])
 
 boolean PCF8574::getPinMode(Pin pin)
 {
-	return _pddr & pin == 0 ? INPUT : OUTPUT;
+	return (_pddr & pin) == 0 ? INPUT : OUTPUT;
 }
 
 void PCF8574::getPinModeAll(boolean array[8])