diff --git a/include/boost/type_traits/is_convertible.hpp b/include/boost/type_traits/is_convertible.hpp
index 40e8b3c..2b933bc 100644
--- a/include/boost/type_traits/is_convertible.hpp
+++ b/include/boost/type_traits/is_convertible.hpp
@@ -149,7 +149,7 @@ struct is_convertible_basic_impl
 {
     static ::boost::type_traits::no_type BOOST_TT_DECL _m_check(any_conversion ...);
     static ::boost::type_traits::yes_type BOOST_TT_DECL _m_check(To, int);
-	    static From _m_from;
+       static From _m_from;
 
     BOOST_STATIC_CONSTANT(bool, value = 
         sizeof( _m_check(_m_from, 0) ) == sizeof(::boost::type_traits::yes_type)