diff --git a/libcxx/include/experimental/deque b/libcxx/include/experimental/deque
--- a/libcxx/include/experimental/deque
+++ b/libcxx/include/experimental/deque
@@ -40,9 +40,13 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _ValueT>
 using deque = _VSTD::deque<_ValueT, polymorphic_allocator<_ValueT>>;
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_DEQUE */
diff --git a/libcxx/include/experimental/forward_list b/libcxx/include/experimental/forward_list
--- a/libcxx/include/experimental/forward_list
+++ b/libcxx/include/experimental/forward_list
@@ -40,9 +40,13 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _ValueT>
 using forward_list = _VSTD::forward_list<_ValueT, polymorphic_allocator<_ValueT>>;
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_FORWARD_LIST */
diff --git a/libcxx/include/experimental/list b/libcxx/include/experimental/list
--- a/libcxx/include/experimental/list
+++ b/libcxx/include/experimental/list
@@ -40,9 +40,13 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _ValueT>
 using list = _VSTD::list<_ValueT, polymorphic_allocator<_ValueT>>;
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_LIST */
diff --git a/libcxx/include/experimental/map b/libcxx/include/experimental/map
--- a/libcxx/include/experimental/map
+++ b/libcxx/include/experimental/map
@@ -45,6 +45,8 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _Key, class _Value, class  _Compare = less<_Key>>
 using map = _VSTD::map<_Key, _Value, _Compare,
                         polymorphic_allocator<pair<const _Key, _Value>>>;
@@ -53,6 +55,8 @@
 using multimap = _VSTD::multimap<_Key, _Value, _Compare,
                         polymorphic_allocator<pair<const _Key, _Value>>>;
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_MAP */
diff --git a/libcxx/include/experimental/memory_resource b/libcxx/include/experimental/memory_resource
--- a/libcxx/include/experimental/memory_resource
+++ b/libcxx/include/experimental/memory_resource
@@ -86,6 +86,8 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 // Round __s up to next multiple of __a.
 inline _LIBCPP_INLINE_VISIBILITY
 size_t __aligned_allocation_size(size_t __s, size_t __a) _NOEXCEPT
@@ -412,6 +414,8 @@
     typename allocator_traits<_Alloc>::template rebind_alloc<char>
   >;
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 _LIBCPP_POP_MACROS
diff --git a/libcxx/include/experimental/regex b/libcxx/include/experimental/regex
--- a/libcxx/include/experimental/regex
+++ b/libcxx/include/experimental/regex
@@ -48,6 +48,8 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _BiDirIter>
 using match_results =
     _VSTD::match_results<_BiDirIter,
@@ -60,6 +62,8 @@
 typedef match_results<_VSTD_LFTS_PMR::wstring::const_iterator> wsmatch;
 #endif
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_REGEX */
diff --git a/libcxx/include/experimental/set b/libcxx/include/experimental/set
--- a/libcxx/include/experimental/set
+++ b/libcxx/include/experimental/set
@@ -45,6 +45,8 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _Value, class  _Compare = less<_Value>>
 using set = _VSTD::set<_Value, _Compare,
                         polymorphic_allocator<_Value>>;
@@ -53,6 +55,8 @@
 using multiset = _VSTD::multiset<_Value, _Compare,
                         polymorphic_allocator<_Value>>;
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_SET */
diff --git a/libcxx/include/experimental/string b/libcxx/include/experimental/string
--- a/libcxx/include/experimental/string
+++ b/libcxx/include/experimental/string
@@ -49,6 +49,8 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _CharT, class _Traits = char_traits<_CharT>>
 using basic_string =
     _VSTD::basic_string<_CharT, _Traits, polymorphic_allocator<_CharT>>;
@@ -60,6 +62,8 @@
 typedef basic_string<wchar_t> wstring;
 #endif
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_STRING */
diff --git a/libcxx/include/experimental/unordered_map b/libcxx/include/experimental/unordered_map
--- a/libcxx/include/experimental/unordered_map
+++ b/libcxx/include/experimental/unordered_map
@@ -59,6 +59,8 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _Key, class _Value,
           class _Hash = hash<_Key>, class _Pred = equal_to<_Key>>
 using unordered_map = _VSTD::unordered_map<_Key, _Value, _Hash, _Pred,
@@ -69,6 +71,8 @@
 using unordered_multimap = _VSTD::unordered_multimap<_Key, _Value, _Hash, _Pred,
                         polymorphic_allocator<pair<const _Key, _Value>>>;
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_UNORDERED_MAP */
diff --git a/libcxx/include/experimental/unordered_set b/libcxx/include/experimental/unordered_set
--- a/libcxx/include/experimental/unordered_set
+++ b/libcxx/include/experimental/unordered_set
@@ -45,6 +45,8 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _Value,
           class _Hash = hash<_Value>, class _Pred = equal_to<_Value>>
 using unordered_set = _VSTD::unordered_set<_Value, _Hash, _Pred,
@@ -55,6 +57,8 @@
 using unordered_multiset = _VSTD::unordered_multiset<_Value, _Hash, _Pred,
                         polymorphic_allocator<_Value>>;
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_UNORDERED_SET */
diff --git a/libcxx/include/experimental/vector b/libcxx/include/experimental/vector
--- a/libcxx/include/experimental/vector
+++ b/libcxx/include/experimental/vector
@@ -40,9 +40,13 @@
 
 _LIBCPP_BEGIN_NAMESPACE_LFTS_PMR
 
+#ifndef _LIBCPP_CXX03_LANG
+
 template <class _ValueT>
 using vector = _VSTD::vector<_ValueT, polymorphic_allocator<_ValueT>>;
 
+#endif // _LIBCPP_CXX03_LANG
+
 _LIBCPP_END_NAMESPACE_LFTS_PMR
 
 #endif /* _LIBCPP_EXPERIMENTAL_VECTOR */