1 files changed, 2 insertions, 0 deletions
diff --git a/utility.h b/utility.h
index 2f3d84a..5da8b7e 100644
--- a/utility.h
+++ b/utility.h
@@ -128,6 +128,8 @@ namespace flask
         {
             template <typename U>
             using push = S<U, T...>;
+            template <typename U>
+            using push_back = S<T..., U>;
             template <template<typename ... Args> class U>
             using rebind = U<T...>;
         };