diff --git a/firmware/usb_dev.c b/firmware/usb_dev.c
index 923870c7493fa6439d1b10fab74154e5a2684ffa..6dfc540afa52d8a2c187e88fa5d7ab6a90a158b3 100644
--- a/firmware/usb_dev.c
+++ b/firmware/usb_dev.c
@@ -29,7 +29,6 @@
  */
 
 #include "mk20dx128.h"
-//#include "HardwareSerial.h"
 #include "usb_dev.h"
 #include "usb_mem.h"