diff --git a/hash/test/Jamfile b/hash/test/Jamfile
index 815d4ab..dfc797c 100644
--- a/hash/test/Jamfile
+++ b/hash/test/Jamfile
@@ -32,6 +32,7 @@ rule hash-test ( names + : extras * )
             [ hash-test hash_string_test ]
             [ hash-test hash_range_test ]
             [ hash-test hash_custom_test ]
+            [ hash-test hash_global_namespace_test ]
             [ hash-test hash_built_in_array_test ]
             [ hash-test hash_value_array_test ]
             [ hash-test hash_vector_test ]
diff --git a/hash/test/Jamfile.v2 b/hash/test/Jamfile.v2
index da47e04..53f915b 100644
--- a/hash/test/Jamfile.v2
+++ b/hash/test/Jamfile.v2
@@ -8,6 +8,11 @@ import testing ;
 
 alias framework : /boost/test//boost_unit_test_framework ;
 
+project hash-tests
+    : requirements
+        <toolset>gcc:<define>_GLIBCXX_DEBUG
+    ;
+
 test-suite functional/hash
     :
         [ run hash_fwd_test_1.cpp framework ]
@@ -19,6 +24,7 @@ test-suite functional/hash
         [ run hash_string_test.cpp framework ]
         [ run hash_range_test.cpp framework ]
         [ run hash_custom_test.cpp framework ]
+        [ run hash_global_namespace_test.cpp framework ]
         [ run hash_built_in_array_test.cpp framework ]
         [ run hash_value_array_test.cpp framework ]
         [ run hash_vector_test.cpp framework ]
diff --git a/hash/test/hash_global_namespace_test.cpp b/hash/test/hash_global_namespace_test.cpp
new file mode 100644
index 0000000..1aa44fd
--- /dev/null
+++ b/hash/test/hash_global_namespace_test.cpp
@@ -0,0 +1,93 @@
+
+//  (C) Copyright Daniel James 2005.
+//  Use, modification and distribution are subject to 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)
+
+// This test demonstrates an ADL bug in Borland 5.5 where ADL isn't performed
+// in the global namespace.
+
+#include <boost/config.hpp>
+#include <cstddef>
+
+struct custom
+{
+    int value_;
+
+    std::size_t hash() const
+    {
+        return value_ * 10;
+    }
+
+#if !defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
+    friend std::size_t hash_value(custom const& x )
+    {
+        return x.hash();
+    }
+#endif
+
+    custom(int x) : value_(x) {}
+};
+
+#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP)
+namespace boost
+{
+    std::size_t hash_value(custom x)
+    {
+        return x.hash();
+    }
+}
+#endif
+
+#include "./config.hpp"
+
+#ifdef TEST_EXTENSIONS
+#  ifdef TEST_STD_INCLUDES
+#    include <functional>
+#  else
+#    include <boost/functional/hash/hash.hpp>
+#  endif
+#endif
+
+#define BOOST_TEST_MAIN
+#include <boost/test/unit_test.hpp>
+
+#ifdef TEST_EXTENSIONS
+
+#include <vector>
+#include <string>
+#include <cctype>
+
+BOOST_AUTO_TEST_CASE(custom_tests)
+{
+    HASH_NAMESPACE::hash<custom> custom_hasher;
+    BOOST_CHECK(custom_hasher(10) == 100u);
+    custom x(55);
+    BOOST_CHECK(custom_hasher(x) == 550u);
+
+    {
+        using namespace HASH_NAMESPACE;
+        BOOST_CHECK(custom_hasher(x) == hash_value(x));
+    }
+
+    std::vector<custom> custom_vector;
+    custom_vector.push_back(5);
+    custom_vector.push_back(25);
+    custom_vector.push_back(35);
+
+    std::size_t seed = 0;
+    HASH_NAMESPACE::hash_combine(seed, custom(5));
+    HASH_NAMESPACE::hash_combine(seed, custom(25));
+    HASH_NAMESPACE::hash_combine(seed, custom(35));
+
+    std::size_t seed2 = 0;
+    HASH_NAMESPACE::hash_combine(seed2, 50u);
+    HASH_NAMESPACE::hash_combine(seed2, 250u);
+    HASH_NAMESPACE::hash_combine(seed2, 350u);
+
+    BOOST_CHECK(seed ==
+            HASH_NAMESPACE::hash_range(custom_vector.begin(), custom_vector.end()));
+    BOOST_CHECK(seed == seed2);
+}
+
+#endif // TEST_EXTENSIONS