diff --git a/include/msgpack/adaptor/cpp11/unordered_map.hpp b/include/msgpack/adaptor/cpp11/unordered_map.hpp
index d90ab0f4..3fe22907 100644
--- a/include/msgpack/adaptor/cpp11/unordered_map.hpp
+++ b/include/msgpack/adaptor/cpp11/unordered_map.hpp
@@ -42,9 +42,9 @@ struct convert<std::unordered_map<K, V>> {
         for(; p != pend; ++p) {
             K key;
             p->key.convert(key);
-            p->val.convert(tmp[key]);
+            p->val.convert(tmp[std::move(key)]);
         }
-        tmp.swap(v);
+        v = std::move(tmp);
         return o;
     }
 };
@@ -100,9 +100,9 @@ struct convert<std::unordered_multimap<K, V>> {
             std::pair<K, V> value;
             p->key.convert(value.first);
             p->val.convert(value.second);
-            tmp.insert(value);
+            tmp.insert(std::move(value));
         }
-        tmp.swap(v);
+        v = std::move(tmp);
         return o;
     }
 };
diff --git a/include/msgpack/adaptor/cpp11/unordered_set.hpp b/include/msgpack/adaptor/cpp11/unordered_set.hpp
index 386e1100..b38ae339 100644
--- a/include/msgpack/adaptor/cpp11/unordered_set.hpp
+++ b/include/msgpack/adaptor/cpp11/unordered_set.hpp
@@ -43,7 +43,7 @@ struct convert<std::unordered_set<T>> {
             --p;
             tmp.insert(p->as<T>());
         }
-        tmp.swap(v);
+        v = std::move(tmp);
         return o;
     }
 };
@@ -97,7 +97,7 @@ struct convert<std::unordered_multiset<T>> {
             --p;
             tmp.insert(p->as<T>());
         }
-        tmp.swap(v);
+        v = std::move(tmp);
         return o;
     }
 };
diff --git a/include/msgpack/adaptor/map.hpp b/include/msgpack/adaptor/map.hpp
index 4cf78219..53ee1a74 100644
--- a/include/msgpack/adaptor/map.hpp
+++ b/include/msgpack/adaptor/map.hpp
@@ -115,16 +115,17 @@ struct convert<std::map<K, V> > {
         for(; p != pend; ++p) {
             K key;
             p->key.convert(key);
-            typename std::map<K,V>::iterator it(tmp.lower_bound(key));
-            if(it != tmp.end() && !(key < it->first)) {
-                p->val.convert(it->second);
-            } else {
-                V val;
-                p->val.convert(val);
-                tmp.insert(it, std::pair<K,V>(key, val));
-            }
+#if __cplusplus >= 201103L
+            p->val.convert(tmp[std::move(key)]);
+#else
+            p->val.convert(tmp[key]);
+#endif
         }
+#if __cplusplus >= 201103L
+        v = std::move(tmp);
+#else
         tmp.swap(v);
+#endif
         return o;
     }
 };
@@ -180,9 +181,17 @@ struct convert<std::multimap<K, V> > {
             std::pair<K, V> value;
             p->key.convert(value.first);
             p->val.convert(value.second);
+#if __cplusplus >= 201103L
+            tmp.insert(std::move(value));
+#else
             tmp.insert(value);
+#endif
         }
+#if __cplusplus >= 201103L
+        v = std::move(tmp);
+#else
         tmp.swap(v);
+#endif
         return o;
     }
 };
diff --git a/include/msgpack/adaptor/set.hpp b/include/msgpack/adaptor/set.hpp
index c44b0b82..82aa2f55 100644
--- a/include/msgpack/adaptor/set.hpp
+++ b/include/msgpack/adaptor/set.hpp
@@ -43,7 +43,11 @@ struct convert<std::set<T> > {
             --p;
             tmp.insert(p->as<T>());
         }
+#if __cplusplus >= 201103L
+        v = std::move(tmp);
+#else
         tmp.swap(v);
+#endif
         return o;
     }
 };
@@ -96,7 +100,11 @@ struct convert<std::multiset<T> > {
             --p;
             tmp.insert(p->as<T>());
         }
+#if __cplusplus >= 201103L
+        v = std::move(tmp);
+#else
         tmp.swap(v);
+#endif
         return o;
     }
 };