1 files changed, 5 insertions, 0 deletions

diff --git a/protocol/usb_hid/parser.h b/protocol/usb_hid/parser.h
index dc14c8270..703eb1ed4 100644
--- a/protocol/usb_hid/parser.h
+++ b/protocol/usb_hid/parser.h
@@ -1,3 +1,6 @@
+#ifndef PARSER_H
+#define PARSER_H
+
 #include "hid.h"
 
 class KBDReportParser : public HIDReportParser
@@ -5,3 +8,5 @@ class KBDReportParser : public HIDReportParser
 public:
         virtual void Parse(HID *hid, bool is_rpt_id, uint8_t len, uint8_t *buf);
 };
+
+#endif