diff --git a/include/boost/detail/basic_pointerbuf.hpp b/include/boost/detail/basic_pointerbuf.hpp
index 81ebfe7..8b56cbe 100644
--- a/include/boost/detail/basic_pointerbuf.hpp
+++ b/include/boost/detail/basic_pointerbuf.hpp
@@ -14,7 +14,7 @@
 #define BOOST_DETAIL_BASIC_POINTERBUF_HPP
 
 // MS compatible compilers support #pragma once
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+#if defined(_MSC_VER)
 # pragma once
 #endif
 
diff --git a/include/boost/lexical_cast.hpp b/include/boost/lexical_cast.hpp
index c3cf818..3c0f230 100644
--- a/include/boost/lexical_cast.hpp
+++ b/include/boost/lexical_cast.hpp
@@ -3,7 +3,7 @@
 
 // MS compatible compilers support #pragma once
 
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+#if defined(_MSC_VER)
 # pragma once
 #endif