diff --git a/include/boost/hana/view.hpp b/include/boost/hana/view.hpp
index bff5744f7f..735ce53077 100644
--- a/include/boost/hana/view.hpp
+++ b/include/boost/hana/view.hpp
@@ -349,7 +349,14 @@ BOOST_HANA_NAMESPACE_BEGIN
 
         // single_view
         template <typename T, typename N>
-        static constexpr decltype(auto) apply(detail::single_view_t<T> view, N const&) {
+        static constexpr T& apply(detail::single_view_t<T>& view, N const&) {
+            static_assert(N::value == 0,
+            "trying to fetch an out-of-bounds element in a hana::single_view");
+            return view.value_;
+        }
+
+        template <typename T, typename N>
+        static constexpr T const& apply(detail::single_view_t<T> const& view, N const&) {
             static_assert(N::value == 0,
             "trying to fetch an out-of-bounds element in a hana::single_view");
             return view.value_;
diff --git a/test/view/flattened/modifications.cpp b/test/view/flattened/modifications.cpp
new file mode 100644
index 0000000000..c3f2a30370
--- /dev/null
+++ b/test/view/flattened/modifications.cpp
@@ -0,0 +1,44 @@
+// Copyright Louis Dionne 2013-2016
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/at.hpp>
+#include <boost/hana/view.hpp>
+
+#include <support/seq.hpp>
+namespace hana = boost::hana;
+
+
+int main() {
+    auto container = ::seq;
+
+    auto storage = container(container(0, 1, 2),
+                             container(3, 4),
+                             container(),
+                             container(5));
+    auto view = hana::detail::flattened(storage);
+    hana::at_c<0>(view) = 90;
+    hana::at_c<1>(view) = 91;
+    hana::at_c<2>(view) = 92;
+    hana::at_c<3>(view) = 93;
+    hana::at_c<4>(view) = 94;
+    hana::at_c<5>(view) = 95;
+
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(view) == 92);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<3>(view) == 93);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<4>(view) == 94);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<5>(view) == 95);
+
+    auto& storage1 = hana::at_c<0>(storage);
+    auto& storage2 = hana::at_c<1>(storage);
+    auto& storage4 = hana::at_c<3>(storage);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage1) == 90);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage1) == 91);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage1) == 92);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage2) == 93);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage2) == 94);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage4) == 95);
+}
diff --git a/test/view/identity/modifications.cpp b/test/view/identity/modifications.cpp
new file mode 100644
index 0000000000..f9a99b248d
--- /dev/null
+++ b/test/view/identity/modifications.cpp
@@ -0,0 +1,29 @@
+// Copyright Louis Dionne 2013-2016
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/at.hpp>
+#include <boost/hana/view.hpp>
+
+#include <support/seq.hpp>
+namespace hana = boost::hana;
+
+
+int main() {
+    auto container = ::seq;
+
+    auto storage = container(0, 1, 2);
+    auto view = hana::detail::identity_view(storage);
+    hana::at_c<0>(view) = 90;
+    hana::at_c<1>(view) = 91;
+    hana::at_c<2>(view) = 92;
+
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(view) == 92);
+
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage) == 90);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage) == 91);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage) == 92);
+}
diff --git a/test/view/joined/modifications.cpp b/test/view/joined/modifications.cpp
new file mode 100644
index 0000000000..61fea1fd1c
--- /dev/null
+++ b/test/view/joined/modifications.cpp
@@ -0,0 +1,36 @@
+// Copyright Louis Dionne 2013-2016
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/at.hpp>
+#include <boost/hana/view.hpp>
+
+#include <support/seq.hpp>
+namespace hana = boost::hana;
+
+
+int main() {
+    auto container = ::seq;
+
+    auto storage1 = container(0, 1, 2);
+    auto storage2 = container(3, 4);
+    auto view = hana::detail::joined(storage1, storage2);
+    hana::at_c<0>(view) = 90;
+    hana::at_c<1>(view) = 91;
+    hana::at_c<2>(view) = 92;
+    hana::at_c<3>(view) = 93;
+    hana::at_c<4>(view) = 94;
+
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(view) == 92);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<3>(view) == 93);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<4>(view) == 94);
+
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage1) == 90);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage1) == 91);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage1) == 92);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage2) == 93);
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage2) == 94);
+}
diff --git a/test/view/single/modifications.cpp b/test/view/single/modifications.cpp
new file mode 100644
index 0000000000..026b8e9900
--- /dev/null
+++ b/test/view/single/modifications.cpp
@@ -0,0 +1,16 @@
+// Copyright Louis Dionne 2013-2016
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/at.hpp>
+#include <boost/hana/view.hpp>
+namespace hana = boost::hana;
+
+
+int main() {
+    auto view = hana::detail::single_view(3);
+    hana::at_c<0>(view) = 93;
+
+    BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 93);
+}
diff --git a/test/view/sliced/modifications.cpp b/test/view/sliced/modifications.cpp
new file mode 100644
index 0000000000..880525935a
--- /dev/null
+++ b/test/view/sliced/modifications.cpp
@@ -0,0 +1,62 @@
+// Copyright Louis Dionne 2013-2016
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/at.hpp>
+#include <boost/hana/range.hpp>
+#include <boost/hana/view.hpp>
+
+#include <support/seq.hpp>
+
+#include <cstddef>
+namespace hana = boost::hana;
+
+
+int main() {
+    auto container = ::seq;
+
+    {
+        auto storage = container(0, 1, 2);
+        auto view = hana::detail::sliced(storage, hana::range_c<std::size_t, 0, 3>);
+        hana::at_c<0>(view) = 90;
+        hana::at_c<1>(view) = 91;
+        hana::at_c<2>(view) = 92;
+
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(view) == 92);
+
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage) == 90);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage) == 91);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage) == 92);
+    }
+
+    {
+        auto storage = container(0, 1, 2);
+        auto view = hana::detail::sliced(storage, hana::range_c<std::size_t, 0, 2>);
+        hana::at_c<0>(view) = 90;
+        hana::at_c<1>(view) = 91;
+
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 90);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 91);
+
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage) == 90);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage) == 91);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage) == 02);
+    }
+
+    {
+        auto storage = container(7, 1, 2);
+        auto view = hana::detail::sliced(storage, hana::range_c<std::size_t, 1, 3>);
+        hana::at_c<0>(view) = 91;
+        hana::at_c<1>(view) = 92;
+
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(view) == 91);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(view) == 92);
+
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(storage) == 07);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(storage) == 91);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(storage) == 92);
+    }
+}