diff --git a/test/unordered/insert_stable_tests.cpp b/test/unordered/insert_stable_tests.cpp
index 51b16e78..aad31dd8 100644
--- a/test/unordered/insert_stable_tests.cpp
+++ b/test/unordered/insert_stable_tests.cpp
@@ -9,34 +9,44 @@
 
 #include <iostream>
 
-struct member {
-    int tag1_;
-    int tag2_;
+namespace insert_stable
+{
+    struct member {
+        int tag1_;
+        int tag2_;
+    
+        member() : tag1_(0), tag2_(0) {}
+        member(int t1, int t2) : tag1_(t1), tag2_(t2) {}
+    
+        friend bool operator==(member const& x, member const& y) {
+            return x.tag1_ == y.tag1_;
+        }
+    
+        friend bool operator!=(member const& x, member const& y) {
+            return x.tag1_ != y.tag1_;
+        }
+    };
+}
 
-    member() : tag1_(0), tag2_(0) {}
-    member(int t1, int t2) : tag1_(t1), tag2_(t2) {}
-
-    friend bool operator==(member const& x, member const& y) {
-        return x.tag1_ == y.tag1_;
+#ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
+namespace boost
+#else
+namespace insert_stable
+#endif
+{
+    std::size_t hash_value(insert_stable::member const& x) {
+        return static_cast<std::size_t>(x.tag1_);
     }
-
-    friend bool operator!=(member const& x, member const& y) {
-        return x.tag1_ != y.tag1_;
-    }
-};
-
-std::size_t hash_value(member const& x) {
-    return static_cast<std::size_t>(x.tag1_);
 }
 
 void stable_insert_test1() {
-    boost::unordered_multiset<member> x;
+    boost::unordered_multiset<insert_stable::member> x;
 
-    x.insert(member(1,1));
-    x.insert(member(1,2));
-    x.insert(member(1,3));
+    x.insert(insert_stable::member(1,1));
+    x.insert(insert_stable::member(1,2));
+    x.insert(insert_stable::member(1,3));
 
-    boost::unordered_multiset<member>::const_iterator it = x.begin(), end = x.end();
+    boost::unordered_multiset<insert_stable::member>::const_iterator it = x.begin(), end = x.end();
     BOOST_TEST(it != end);
     if(it != end) { BOOST_TEST(it->tag2_ == 1); ++it; }
     BOOST_TEST(it != end);
@@ -47,12 +57,12 @@ void stable_insert_test1() {
 }
 
 void stable_insert_test2() {
-    boost::unordered_multimap<member, int> x;
-    typedef boost::unordered_multimap<member, int>::const_iterator iterator;
+    boost::unordered_multimap<insert_stable::member, int> x;
+    typedef boost::unordered_multimap<insert_stable::member, int>::const_iterator iterator;
 
-    iterator it = x.insert(x.end(), std::make_pair(member(1,1), 1));
-    it = x.insert(it, std::make_pair(member(1,2), 2));
-    it = x.insert(it, std::make_pair(member(1,3), 3));
+    iterator it = x.insert(x.end(), std::make_pair(insert_stable::member(1,1), 1));
+    it = x.insert(it, std::make_pair(insert_stable::member(1,2), 2));
+    it = x.insert(it, std::make_pair(insert_stable::member(1,3), 3));
 
     it = x.begin();
     iterator end = x.end();