diff --git a/include/boost/range/detail/extract_optional_type.hpp b/include/boost/range/detail/extract_optional_type.hpp
old mode 100755
new mode 100644
index 8292e34..4a7f71a
--- a/include/boost/range/detail/extract_optional_type.hpp
+++ b/include/boost/range/detail/extract_optional_type.hpp
@@ -16,7 +16,7 @@
 
 #include <boost/config.hpp>
 
-#ifdef BOOST_NO_PARTIAL_TEMPLATE_SPECIALIZATION
+#ifdef BOOST_NO_PARTIAL_SPECIALIZATION_IMPLICIT_DEFAULT_ARGS
 
 #define BOOST_RANGE_EXTRACT_OPTIONAL_TYPE( a_typedef )                         \
     template< typename C >                                                     \