diff --git a/include/boost/bind.hpp b/include/boost/bind.hpp
index fd3421e..503fb4d 100644
--- a/include/boost/bind.hpp
+++ b/include/boost/bind.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/bind/arg.hpp b/include/boost/bind/arg.hpp
index 0d5cd03..c1da4d0 100644
--- a/include/boost/bind/arg.hpp
+++ b/include/boost/bind/arg.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/bind/bind.hpp b/include/boost/bind/bind.hpp
index fb67097..957974d 100644
--- a/include/boost/bind/bind.hpp
+++ b/include/boost/bind/bind.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/bind/mem_fn.hpp b/include/boost/bind/mem_fn.hpp
index 3b00f17..faf9848 100644
--- a/include/boost/bind/mem_fn.hpp
+++ b/include/boost/bind/mem_fn.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/bind/placeholders.hpp b/include/boost/bind/placeholders.hpp
index 3b098b1..97e7a68 100644
--- a/include/boost/bind/placeholders.hpp
+++ b/include/boost/bind/placeholders.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/bind/storage.hpp b/include/boost/bind/storage.hpp
index be490b0..556f707 100644
--- a/include/boost/bind/storage.hpp
+++ b/include/boost/bind/storage.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/is_placeholder.hpp b/include/boost/is_placeholder.hpp
index 5f1b544..fb746f2 100644
--- a/include/boost/is_placeholder.hpp
+++ b/include/boost/is_placeholder.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/mem_fn.hpp b/include/boost/mem_fn.hpp
index 3bcd2c5..8932d4d 100644
--- a/include/boost/mem_fn.hpp
+++ b/include/boost/mem_fn.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