1 files changed, 5 insertions, 0 deletions
diff --git a/rfbproto.h b/rfbproto.h
index 5ef1d90..2103c81 100644
--- a/rfbproto.h
+++ b/rfbproto.h
@@ -1,3 +1,6 @@
+#ifndef RFBPROTO_H
+#define RFBPROTO_H
+
 /*
  *  Copyright (C) 2000, 2001 Const Kaplinsky.  All Rights Reserved.
  *  Copyright (C) 2000 Tridia Corporation.  All Rights Reserved.
@@ -783,3 +786,5 @@ typedef union {
     rfbPointerEventMsg pe;
     rfbClientCutTextMsg cct;
 } rfbClientToServerMsg;
+
+#endif