diff --git a/include/boost/container_hash/detail/is_unordered_range.hpp b/include/boost/container_hash/detail/is_unordered_range.hpp
new file mode 100644
index 0000000..218cffb
--- /dev/null
+++ b/include/boost/container_hash/detail/is_unordered_range.hpp
@@ -0,0 +1,34 @@
+// Copyright 2017 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_HASH_DETAIL_IS_UNORDERED_RANGE_HPP_INCLUDED
+#define BOOST_HASH_DETAIL_IS_UNORDERED_RANGE_HPP_INCLUDED
+
+#include <boost/container_hash/detail/is_range.hpp>
+#include <boost/type_traits/integral_constant.hpp>
+#include <boost/type_traits/is_same.hpp>
+
+namespace boost
+{
+namespace hash_detail
+{
+
+template<class T, class E = true_type> struct has_hasher_: false_type
+{
+};
+
+template<class T> struct has_hasher_< T, integral_constant< bool,
+        is_same<typename T::hasher, typename T::hasher>::value
+    > >: true_type
+{
+};
+
+template<class T> struct is_unordered_range: integral_constant< bool, is_range<T>::value && has_hasher_<T>::value >
+{
+};
+
+} // namespace hash_detail
+} // namespace boost
+
+#endif // #ifndef BOOST_HASH_DETAIL_IS_UNORDERED_RANGE_HPP_INCLUDED
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index c6d2ac8..e960607 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -88,3 +88,4 @@ build-project ../examples ;
 
 run detail_is_range_test.cpp ;
 run detail_is_contiguous_range_test.cpp ;
+run detail_is_unordered_range_test.cpp ;
diff --git a/test/detail_is_unordered_range_test.cpp b/test/detail_is_unordered_range_test.cpp
new file mode 100644
index 0000000..698edcb
--- /dev/null
+++ b/test/detail_is_unordered_range_test.cpp
@@ -0,0 +1,98 @@
+// Copyright 2017 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/container_hash/detail/is_unordered_range.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <boost/config.hpp>
+#include <string>
+#include <vector>
+#include <list>
+#include <deque>
+#include <set>
+#include <map>
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+# include <array>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+# include <forward_list>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+# include <unordered_set>
+#endif
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
+# include <unordered_map>
+#endif
+
+struct X
+{
+};
+
+int main()
+{
+    using boost::hash_detail::is_unordered_range;
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<void>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<void const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<int>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<int const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<X>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<X const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<int[2]>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<int const[2]>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<std::string>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<std::string const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<std::wstring>));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range<std::wstring const>));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::vector<X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::vector<X> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::deque<X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::deque<X> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::set<int> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::set<int> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::multiset<int> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::multiset<int> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::map<int, X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::map<int, X> const >));
+
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::multimap<int, X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::multimap<int, X> const >));
+
+#if !defined(BOOST_NO_CXX11_HDR_ARRAY)
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::array<X, 2> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::array<X, 2> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::forward_list<X> >));
+    BOOST_TEST_TRAIT_FALSE((is_unordered_range< std::forward_list<X> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_SET)
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_set<int> >));
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_set<int> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_multiset<int> >));
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_multiset<int> const >));
+#endif
+
+#if !defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP)
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_map<int, X> >));
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_map<int, X> const >));
+
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_multimap<int, X> >));
+    BOOST_TEST_TRAIT_TRUE((is_unordered_range< std::unordered_multimap<int, X> const >));
+#endif
+
+    return boost::report_errors();
+}