diff --git a/example/same_fringe.cpp b/example/same_fringe.cpp
index 52b9055..98d52bc 100644
--- a/example/same_fringe.cpp
+++ b/example/same_fringe.cpp
@@ -103,8 +103,8 @@ int main()
                     traverse(left_d,out);
                     });
             std::cout << "left tree from d:\n";
-            std::copy(begin(left_d_reader),
-                    end(left_d_reader),
+            std::copy(std::begin(left_d_reader),
+                    std::end(left_d_reader),
                     std::ostream_iterator<std::string>(std::cout, " "));
             std::cout << std::endl;
 
@@ -113,8 +113,8 @@ int main()
                     traverse(right_b,out);
                     });
             std::cout << "right tree from b:\n";
-            std::copy(begin(right_b_reader),
-                    end(right_b_reader),
+            std::copy(std::begin(right_b_reader),
+                    std::end(right_b_reader),
                     std::ostream_iterator<std::string>(std::cout, " "));
             std::cout << std::endl;
 
@@ -123,8 +123,8 @@ int main()
                     traverse(right_x,out);
                     });
             std::cout << "right tree from x:\n";
-            std::copy(begin(right_x_reader),
-                    end(right_x_reader),
+            std::copy(std::begin(right_x_reader),
+                    std::end(right_x_reader),
                     std::ostream_iterator<std::string>(std::cout, " "));
             std::cout << std::endl;
         }
@@ -146,9 +146,9 @@ int main()
 
             std::cout << "left tree from d == right tree from b? "
                 << std::boolalpha
-                << std::equal(begin(left_d_reader),
-                        end(left_d_reader),
-                        begin(right_b_reader))
+                << std::equal(std::begin(left_d_reader),
+                        std::end(left_d_reader),
+                        std::begin(right_b_reader))
                 << std::endl;
         }
     }
@@ -169,9 +169,9 @@ int main()
 
             std::cout << "left tree from d == right tree from x? "
                 << std::boolalpha
-                << std::equal(begin(left_d_reader),
-                        end(left_d_reader),
-                        begin(right_x_reader))
+                << std::equal(std::begin(left_d_reader),
+                        std::end(left_d_reader),
+                        std::begin(right_x_reader))
                 << std::endl;
         }
     }
diff --git a/include/boost/coroutine2/detail/pull_coroutine.hpp b/include/boost/coroutine2/detail/pull_coroutine.hpp
index 0bb8ea9..96d10d6 100644
--- a/include/boost/coroutine2/detail/pull_coroutine.hpp
+++ b/include/boost/coroutine2/detail/pull_coroutine.hpp
@@ -294,6 +294,22 @@ end( pull_coroutine< T > &) {
 
 }}}
 
+namespace std {
+
+template< typename T >
+typename boost::coroutines2::detail::pull_coroutine< T >::iterator
+begin( boost::coroutines2::detail::pull_coroutine< T > & c) {
+    return boost::coroutines2::detail::begin( c);
+}
+
+template< typename T >
+typename boost::coroutines2::detail::pull_coroutine< T >::iterator
+end( boost::coroutines2::detail::pull_coroutine< T > & c) {
+    return boost::coroutines2::detail::end( c);
+}
+
+}
+
 #ifdef BOOST_HAS_ABI_HEADERS
 #  include BOOST_ABI_SUFFIX
 #endif
diff --git a/test/test_coroutine.cpp b/test/test_coroutine.cpp
index 0a9da6a..d4fbd8b 100644
--- a/test/test_coroutine.cpp
+++ b/test/test_coroutine.cpp
@@ -518,14 +518,11 @@ void test_exceptions()
 void test_input_iterator()
 {
     {
-        using std::begin;
-        using std::end;
-
         std::vector< int > vec;
         coro::coroutine< int >::pull_type coro( f16);
-        coro::coroutine< int >::pull_type::iterator e = end( coro);
+        coro::coroutine< int >::pull_type::iterator e = std::end( coro);
         for (
-            coro::coroutine< int >::pull_type::iterator i = begin( coro);
+            coro::coroutine< int >::pull_type::iterator i = std::begin( coro);
             i != e; ++i)
         { vec.push_back( * i); }
         BOOST_CHECK_EQUAL( ( std::size_t)5, vec.size() );