diff --git a/actionpack/lib/action_controller/metal.rb b/actionpack/lib/action_controller/metal.rb
index e7d776b63e7d73602e8bfea0b809a95367e3c3c5..82d05414b9006e1f28f3dd1eaede7136661eeec2 100644
--- a/actionpack/lib/action_controller/metal.rb
+++ b/actionpack/lib/action_controller/metal.rb
@@ -72,11 +72,11 @@ def location=(url)
     def call(name, env)
       @_env = env
       process(name)
-      to_rack
+      to_a
     end
 
     # :api: private
-    def to_rack
+    def to_a
       [status, headers, response_body]
     end
 
diff --git a/actionpack/lib/action_controller/metal/rack_convenience.rb b/actionpack/lib/action_controller/metal/rack_convenience.rb
index 805157b0e39a8e2f6ef33d40639db2c4f13c2737..5fac445dabc0ea553c17f30fc876373346de0704 100644
--- a/actionpack/lib/action_controller/metal/rack_convenience.rb
+++ b/actionpack/lib/action_controller/metal/rack_convenience.rb
@@ -20,7 +20,7 @@ def params
     end
 
     # :api: private
-    def to_rack
+    def to_a
       @_response.prepare!
       @_response.to_a
     end