diff --git a/include/boost/type_traits/type_with_alignment.hpp b/include/boost/type_traits/type_with_alignment.hpp
index 85cadcd..e4860f9 100644
--- a/include/boost/type_traits/type_with_alignment.hpp
+++ b/include/boost/type_traits/type_with_alignment.hpp
@@ -120,8 +120,7 @@ template<> struct is_pod< ::boost::tt_align_ns::a128> : public true_type{};
 // registers.  Therefore we extend type_with_alignment<> to support
 // such types, however, we have to be careful to use a builtin type
 // whenever possible otherwise we break previously working code:
-// see https://groups.google.com/g/boost-developers-archive/c/cM9xfiqkwLo
-// (originally http://article.gmane.org/gmane.comp.lib.boost.devel/173011)
+// see https://lists.boost.org/Archives/boost/2014/03/212391.php
 // for an example and test case.  Thus types like a8 below will
 // be used *only* if the existing implementation can't provide a type
 // with suitable alignment.  This does mean however, that type_with_alignment<>