diff --git a/include/boost/blank.hpp b/include/boost/blank.hpp
index f84f2d9..d0fe5ab 100644
--- a/include/boost/blank.hpp
+++ b/include/boost/blank.hpp
@@ -15,9 +15,11 @@
 
 #include "boost/blank_fwd.hpp"
 
+#if !defined(BOOST_NO_IOSTREAM)
 #include <iosfwd> // for std::basic_ostream forward declare
-
 #include "boost/detail/templated_streams.hpp"
+#endif // BOOST_NO_IOSTREAM
+
 #include "boost/mpl/bool.hpp"
 #include "boost/type_traits/is_empty.hpp"
 #include "boost/type_traits/is_pod.hpp"
@@ -85,6 +87,8 @@ inline bool operator>(const blank&, const blank&)
 
 // streaming support
 //
+#if !defined(BOOST_NO_IOSTREAM)
+
 BOOST_TEMPLATED_STREAM_TEMPLATE(E,T)
 inline BOOST_TEMPLATED_STREAM(ostream, E,T)& operator<<(
       BOOST_TEMPLATED_STREAM(ostream, E,T)& out
@@ -95,6 +99,8 @@ inline BOOST_TEMPLATED_STREAM(ostream, E,T)& operator<<(
     return out;
 }
 
+#endif // BOOST_NO_IOSTREAM
+
 } // namespace boost
 
 #endif // BOOST_BLANK_HPP