diff --git a/include/type_traits b/include/type_traits
index c63dea481..735eab790 100644
--- a/include/type_traits
+++ b/include/type_traits
@@ -425,7 +425,7 @@ template <bool _Bp, class _Tp = void> using enable_if_t = typename enable_if<_Bp
 #endif
 
 // addressof
-#if __has_builtin(__builtin_addressof)
+#if __has_builtin(__builtin_addressof) || _GNUC_VER >= 700
 
 template <class _Tp>
 inline _LIBCPP_CONSTEXPR_AFTER_CXX14
diff --git a/test/libcxx/test/config.py b/test/libcxx/test/config.py
index 9812e358b..b05029d96 100644
--- a/test/libcxx/test/config.py
+++ b/test/libcxx/test/config.py
@@ -179,6 +179,7 @@ class Configuration(object):
             assert self.cxx.version is not None
             maj_v, min_v, _ = self.cxx.version
             self.config.available_features.add(cxx_type)
+            self.config.available_features.add('%s-%s' % (cxx_type, maj_v))
             self.config.available_features.add('%s-%s.%s' % (
                 cxx_type, maj_v, min_v))
 
diff --git a/test/std/utilities/memory/specialized.algorithms/specialized.addressof/constexpr_addressof.pass.cpp b/test/std/utilities/memory/specialized.algorithms/specialized.addressof/constexpr_addressof.pass.cpp
index a371f8eda..41f06c519 100644
--- a/test/std/utilities/memory/specialized.algorithms/specialized.addressof/constexpr_addressof.pass.cpp
+++ b/test/std/utilities/memory/specialized.algorithms/specialized.addressof/constexpr_addressof.pass.cpp
@@ -8,7 +8,7 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++98, c++03, c++11, c++14
-// XFAIL: gcc
+// XFAIL: gcc-4, gcc-5, gcc-6
 
 // <memory>