diff --git a/hardware/arduino/avr/cores/arduino/WInterrupts.c b/hardware/arduino/avr/cores/arduino/WInterrupts.c
index 83b762f5d..7e9f71702 100644
--- a/hardware/arduino/avr/cores/arduino/WInterrupts.c
+++ b/hardware/arduino/avr/cores/arduino/WInterrupts.c
@@ -62,7 +62,7 @@ static volatile voidFuncPtr intFunc[EXTERNAL_NUM_INTERRUPTS] = {
     nothing,
 #endif
 #if EXTERNAL_NUM_INTERRUPTS > 0
-    nothing
+    nothing,
 #endif
 };
 // volatile static voidFuncPtr twiIntFunc;