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-rw-r--r--boost/iterator/transform_iterator.hpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/boost/iterator/transform_iterator.hpp b/boost/iterator/transform_iterator.hpp
index 86565b8365..b79a440c3a 100644
--- a/boost/iterator/transform_iterator.hpp
+++ b/boost/iterator/transform_iterator.hpp
@@ -46,7 +46,7 @@ namespace boost
// the function.
typedef typename ia_dflt_help<
Reference
- , result_of<UnaryFunc(typename std::iterator_traits<Iterator>::reference)>
+ , result_of<const UnaryFunc(typename std::iterator_traits<Iterator>::reference)>
>::type reference;
// To get the default for Value: remove any reference on the