diff --git a/RFM69.h b/RFM69.h
index e27a7b6..72feb86 100644
--- a/RFM69.h
+++ b/RFM69.h
@@ -45,7 +45,7 @@
 #elif defined(__AVR_ATmega32U4__)
   #define RF69_IRQ_PIN          3
   #define RF69_IRQ_NUM          0
-#elif defined(__arm__)
+#elif defined(__arm__)//Use pin 10 or any pin you want
   #define RF69_IRQ_PIN          10
   #define RF69_IRQ_NUM          10
 #else