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-rw-r--r--boost/concept_archetype.hpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/boost/concept_archetype.hpp b/boost/concept_archetype.hpp
index f21c817384..f2455fd855 100644
--- a/boost/concept_archetype.hpp
+++ b/boost/concept_archetype.hpp
@@ -15,9 +15,10 @@
#define BOOST_CONCEPT_ARCHETYPES_HPP
#include <boost/config.hpp>
-#include <boost/iterator.hpp>
#include <boost/mpl/identity.hpp>
#include <functional>
+#include <iterator> // iterator tags
+#include <cstddef> // std::ptrdiff_t
namespace boost {