1 files changed, 6 insertions, 3 deletions
diff --git a/lib/arel/engines/memory/relations/array.rb b/lib/arel/engines/memory/relations/array.rb
index 6486dcbcc1..d8751fa626 100644
--- a/lib/arel/engines/memory/relations/array.rb
+++ b/lib/arel/engines/memory/relations/array.rb
@@ -15,9 +15,12 @@ module Arel
     end
 
     def attributes
-      @attributes ||= @attribute_names_and_types.collect do |attribute, type|
-        attribute = type.new(self, attribute) if Symbol === attribute
-        attribute
+      @attributes ||= begin
+        attrs = @attribute_names_and_types.collect do |attribute, type|
+          attribute = type.new(self, attribute) if Symbol === attribute
+          attribute
+        end
+        Header.new(attrs)
       end
     end