diff --git a/src/midi_USB.h b/src/midi_USB.h
index 7ff7875..14aaeed 100644
--- a/src/midi_USB.h
+++ b/src/midi_USB.h
@@ -99,7 +99,7 @@ struct UsbMidiEvent
             byte mCodeIndexNumber:4;
             byte mMidi[3];
         };
-        byte[4]     mDataArray;
+        byte     mDataArray[4];
     };
 };