diff --git a/include/boost/program_options.hpp b/include/boost/program_options.hpp
index 31c356f..dc35011 100644
--- a/include/boost/program_options.hpp
+++ b/include/boost/program_options.hpp
@@ -8,7 +8,7 @@
 #ifndef PROGRAM_OPTIONS_VP_2003_05_19
 #define PROGRAM_OPTIONS_VP_2003_05_19
 
-#if defined(_MSC_VER) && _MSC_VER >= 1020
+#if defined(_MSC_VER)
 #pragma once
 #endif