diff --git a/include/boost/range/concepts.hpp b/include/boost/range/concepts.hpp
index d6235d6..63db885 100644
--- a/include/boost/range/concepts.hpp
+++ b/include/boost/range/concepts.hpp
@@ -24,6 +24,7 @@
 #include <boost/range/value_type.hpp>
 #include <boost/range/detail/misc_concept.hpp>
 #include <boost/type_traits/remove_reference.hpp>
+#include <boost/type_traits/is_integral.hpp>
 
 #include <iterator>