diff --git a/include/boost/detail/lightweight_thread.hpp b/include/boost/detail/lightweight_thread.hpp
index 6fe70a6..8eba1f8 100644
--- a/include/boost/detail/lightweight_thread.hpp
+++ b/include/boost/detail/lightweight_thread.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
 
diff --git a/include/boost/detail/quick_allocator.hpp b/include/boost/detail/quick_allocator.hpp
index d54b3a7..ba048e0 100644
--- a/include/boost/detail/quick_allocator.hpp
+++ b/include/boost/detail/quick_allocator.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