diff --git a/STM32F1/system/libmaple/usb/usb_lib/usb_type.h b/STM32F1/system/libmaple/usb/usb_lib/usb_type.h
index 34b3bf5..02bd5ef 100644
--- a/STM32F1/system/libmaple/usb/usb_lib/usb_type.h
+++ b/STM32F1/system/libmaple/usb/usb_lib/usb_type.h
@@ -62,7 +62,7 @@ typedef enum { RESET = 0, SET   = !RESET } FlagStatus, ITStatus;
 
 typedef enum { DISABLE = 0, ENABLE  = !DISABLE} FunctionalState;
 
-typedef enum { ERROR = 0, SUCCESS  = !ERROR} ErrorStatus;
+//typedef enum { ERROR = 0, SUCCESS  = !ERROR} ErrorStatus;
 
 /* Exported macro ------------------------------------------------------------*/
 /* Exported functions ------------------------------------------------------- */