diff --git a/asio/src/Makefile.mgw b/asio/src/Makefile.mgw
index 86b208c7d1..e05de8755a 100644
--- a/asio/src/Makefile.mgw
+++ b/asio/src/Makefile.mgw
@@ -53,6 +53,8 @@ UNIT_TEST_EXES = \
 	tests/unit/ip/udp.exe \
 	tests/unit/ip/unicast.exe \
 	tests/unit/ip/v6_only.exe \
+	tests/unit/is_buffer_sequence.exe \
+	tests/unit/is_buffer_sequence_no_decltype.exe \
 	tests/unit/is_read_buffered.exe \
 	tests/unit/is_write_buffered.exe \
 	tests/unit/placeholders.exe \
diff --git a/asio/src/Makefile.msc b/asio/src/Makefile.msc
index 8fafd15450..ed26bf7ea9 100644
--- a/asio/src/Makefile.msc
+++ b/asio/src/Makefile.msc
@@ -174,6 +174,8 @@ UNIT_TEST_EXES = \
 	tests\unit\ip\udp.exe \
 	tests\unit\ip\unicast.exe \
 	tests\unit\ip\v6_only.exe \
+	tests\unit\is_buffer_sequence.exe \
+	tests\unit\is_buffer_sequence_no_decltype.exe \
 	tests\unit\is_read_buffered.exe \
 	tests\unit\is_write_buffered.exe \
 	tests\unit\packaged_task.exe \
diff --git a/asio/src/tests/Makefile.am b/asio/src/tests/Makefile.am
index 4c7ffd245b..4cbedc4484 100644
--- a/asio/src/tests/Makefile.am
+++ b/asio/src/tests/Makefile.am
@@ -74,6 +74,8 @@ check_PROGRAMS = \
 	unit/ip/udp \
 	unit/ip/unicast \
 	unit/ip/v6_only \
+	unit/is_buffer_sequence \
+	unit/is_buffer_sequence_no_decltype \
 	unit/is_read_buffered \
 	unit/is_write_buffered \
 	unit/local/basic_endpoint \
@@ -208,6 +210,8 @@ TESTS = \
 	unit/ip/udp \
 	unit/ip/unicast \
 	unit/ip/v6_only \
+	unit/is_buffer_sequence \
+	unit/is_buffer_sequence_no_decltype \
 	unit/is_read_buffered \
 	unit/is_write_buffered \
 	unit/local/basic_endpoint \
@@ -352,6 +356,8 @@ unit_ip_tcp_SOURCES = unit/ip/tcp.cpp
 unit_ip_udp_SOURCES = unit/ip/udp.cpp
 unit_ip_unicast_SOURCES = unit/ip/unicast.cpp
 unit_ip_v6_only_SOURCES = unit/ip/v6_only.cpp
+unit_is_buffer_sequence_SOURCES = unit/is_buffer_sequence.cpp
+unit_is_buffer_sequence_no_decltype_SOURCES = unit/is_buffer_sequence_no_decltype.cpp
 unit_is_read_buffered_SOURCES = unit/is_read_buffered.cpp
 unit_is_write_buffered_SOURCES = unit/is_write_buffered.cpp
 unit_local_basic_endpoint_SOURCES = unit/local/basic_endpoint.cpp
diff --git a/asio/src/tests/unit/is_buffer_sequence.cpp b/asio/src/tests/unit/is_buffer_sequence.cpp
new file mode 100644
index 0000000000..f58882a461
--- /dev/null
+++ b/asio/src/tests/unit/is_buffer_sequence.cpp
@@ -0,0 +1,119 @@
+//
+// is_buffer_sequence.cpp
+// ~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2019 Alexander Karzhenkov
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include <vector>
+#include "asio/buffer.hpp"
+#include "unit_test.hpp"
+
+#ifdef ASIO_HAS_DECLTYPE
+# define ASIO_HAS_DECLTYPE_MSG "ASIO_HAS_DECLTYPE is defined"
+# define ASIO_HAS_DECLTYPE_FLAG true
+#else
+# define ASIO_HAS_DECLTYPE_MSG "ASIO_HAS_DECLTYPE is not defined"
+# define ASIO_HAS_DECLTYPE_FLAG false
+#endif
+
+using namespace asio;
+
+namespace {
+
+struct A1
+{
+  mutable_buffer* begin();
+
+  // no "value_type" type
+  // no "const_iterator" type
+  // no "end" member function
+};
+
+struct B1
+{
+  typedef mutable_buffer value_type;
+
+  // bad "const_iterator" type
+  typedef void const_iterator;
+
+  // no "begin" member function
+  // no "end" member function
+};
+
+struct X1
+{
+  typedef mutable_buffer value_type;
+  typedef const mutable_buffer* const_iterator;
+
+  const mutable_buffer* begin() const;
+  const mutable_buffer* end() const;
+};
+
+struct B2
+{
+  typedef mutable_buffer value_type;
+  typedef void const_iterator; // (!)
+
+  const mutable_buffer* begin() const;
+  const mutable_buffer* end() const;
+};
+
+struct B3
+{
+  typedef mutable_buffer value_type;
+  typedef const mutable_buffer* const_iterator;
+
+  int begin; // (!)
+  const mutable_buffer* end() const;
+};
+
+struct C1
+{
+  typedef mutable_buffer value_type;
+  typedef const mutable_buffer* const_iterator;
+
+  const mutable_buffer* begin() const;
+  int end() const; // (!)
+};
+
+void run()
+{
+  ASIO_TEST_IOSTREAM << ASIO_HAS_DECLTYPE_MSG << std::endl;
+
+  ASIO_CHECK(!is_mutable_buffer_sequence<A1>::value);
+  ASIO_CHECK(!is_mutable_buffer_sequence<B1>::value);
+  ASIO_CHECK( is_mutable_buffer_sequence<X1>::value);
+  ASIO_CHECK( is_mutable_buffer_sequence<B2>::value == ASIO_HAS_DECLTYPE_FLAG);
+  ASIO_CHECK(!is_mutable_buffer_sequence<B3>::value);
+  ASIO_CHECK(!is_mutable_buffer_sequence<C1>::value);
+
+  ASIO_CHECK(!is_mutable_buffer_sequence<void>::value);
+  ASIO_CHECK(!is_const_buffer_sequence<void>::value);
+
+  ASIO_CHECK(!is_mutable_buffer_sequence<int>::value);
+  ASIO_CHECK(!is_const_buffer_sequence<int>::value);
+
+  ASIO_CHECK( is_mutable_buffer_sequence<mutable_buffer>::value);
+  ASIO_CHECK( is_const_buffer_sequence<mutable_buffer>::value);
+
+  ASIO_CHECK(!is_mutable_buffer_sequence<const_buffer>::value);
+  ASIO_CHECK( is_const_buffer_sequence<const_buffer>::value);
+
+  ASIO_CHECK( is_mutable_buffer_sequence<std::vector<mutable_buffer> >::value);
+  ASIO_CHECK( is_const_buffer_sequence<std::vector<mutable_buffer> >::value);
+
+  ASIO_CHECK(!is_mutable_buffer_sequence<std::vector<const_buffer> >::value);
+  ASIO_CHECK( is_const_buffer_sequence<std::vector<const_buffer> >::value);
+}
+
+} // namespace
+
+ASIO_TEST_SUITE
+(
+  "is_buffer_sequence",
+  ASIO_TEST_CASE(run)
+)
diff --git a/asio/src/tests/unit/is_buffer_sequence_no_decltype.cpp b/asio/src/tests/unit/is_buffer_sequence_no_decltype.cpp
new file mode 100644
index 0000000000..1a1d580130
--- /dev/null
+++ b/asio/src/tests/unit/is_buffer_sequence_no_decltype.cpp
@@ -0,0 +1,12 @@
+//
+// is_buffer_sequence_no_decltype.cpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2019 Alexander Karzhenkov
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#define ASIO_DISABLE_DECLTYPE
+#include "is_buffer_sequence.cpp"