diff --git a/kex.h b/kex.h
index a4a8af3..a48c5c8 100644
--- a/kex.h
+++ b/kex.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: kex.h,v 1.42 2006/04/20 09:27:09 djm Exp $ */
+/* $OpenBSD: kex.h,v 1.43 2006/07/23 01:11:05 stevesk Exp $ */
 
 /*
  * Copyright (c) 2000, 2001 Markus Friedl.  All rights reserved.
@@ -28,6 +28,9 @@
 
 #include <signal.h>
 #include <openssl/evp.h>
+
+#include <signal.h>
+
 #include "buffer.h"
 #include "cipher.h"
 #include "key.h"