Fix build.

From-SVN: r236823

diff --git a/libstdc++-v3/include/std/tuple b/libstdc++-v3/include/std/tuple
index 5ef3003b70649e2294fe5fff2eecb8fcb9d2b154..ea887932072507d6a476537399b06c2370fc5d48 100644 (file)
--- a/libstdc++-v3/include/std/tuple
+++ b/libstdc++-v3/include/std/tuple
@@ -629,7 +629,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       // need to be constrained.
       template<typename... _UElements> using _TMCT =
                   _TC<(sizeof...(_Elements) == sizeof...(_UElements))
-                     && !is_same<tuple<Elements...>,
+                     && !is_same<tuple<_Elements...>,
                                  tuple<_UElements...>>::value,
                       _Elements...>;