diff --git a/include/boost/range/istream_range.hpp b/include/boost/range/istream_range.hpp
old mode 100755
new mode 100644
index c3f2248..5da87cc
--- a/include/boost/range/istream_range.hpp
+++ b/include/boost/range/istream_range.hpp
@@ -14,7 +14,7 @@
  */
 
 #include <iterator>
-#include <istream>
+#include <iosfwd>
 #include <boost/config.hpp>
 #include <boost/range/iterator_range.hpp>