diff --git a/src/PinChangeInterrupt.h b/src/PinChangeInterrupt.h
index b21e60e..e3bb770 100644
--- a/src/PinChangeInterrupt.h
+++ b/src/PinChangeInterrupt.h
@@ -29,7 +29,7 @@ THE SOFTWARE.
 
 #include "Arduino.h"
 
-#ifdef ARDUINO_ARCH_ARM
+#ifndef ARDUINO_ARCH_AVR
 #error This library can only be used with AVR
 #endif