From 9b6b3e00d451b8f96d7a308c78ed8cda75cdf577 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Thu, 12 Jun 2003 17:09:24 +0000
Subject: [PATCH] -Wundef fixes.

[SVN r18788]
---
 include/boost/throw_exception.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/throw_exception.hpp b/include/boost/throw_exception.hpp
index 3f06fcd..97a2695 100644
--- a/include/boost/throw_exception.hpp
+++ b/include/boost/throw_exception.hpp
@@ -1,8 +1,8 @@
 #ifndef BOOST_THROW_EXCEPTION_HPP_INCLUDED
 #define BOOST_THROW_EXCEPTION_HPP_INCLUDED
 
-#if _MSC_VER >= 1020
-#pragma once
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
 #endif
 
 //