2 files changed, 6 insertions, 2 deletions
diff --git a/lib/arel/algebra/relations/utilities/compound.rb b/lib/arel/algebra/relations/utilities/compound.rb
index 7039b82575..416717310c 100644
--- a/lib/arel/algebra/relations/utilities/compound.rb
+++ b/lib/arel/algebra/relations/utilities/compound.rb
@@ -13,7 +13,7 @@ module Arel
       @requires
     end
 
-    [:attributes, :wheres, :groupings, :orders, :havings, :projections].each do |operation_name|
+    [:wheres, :groupings, :orders, :havings, :projections].each do |operation_name|
       class_eval <<-OPERATION, __FILE__, __LINE__
         def #{operation_name}
           @#{operation_name} ||= relation.#{operation_name}.collect { |o| o.bind(self) }
@@ -21,6 +21,10 @@ module Arel
       OPERATION
     end
 
+    def attributes
+      @attributes ||= relation.attributes.bind(self)
+    end
+
     def hash
       @hash ||= :relation.hash
     end
diff --git a/lib/arel/algebra/relations/utilities/externalization.rb b/lib/arel/algebra/relations/utilities/externalization.rb
index 795a3919f2..edd8f99221 100644
--- a/lib/arel/algebra/relations/utilities/externalization.rb
+++ b/lib/arel/algebra/relations/utilities/externalization.rb
@@ -8,7 +8,7 @@ module Arel
     end
 
     def attributes
-      @attributes ||= relation.attributes.collect { |a| a.to_attribute(self) }
+      @attributes ||= Header.new(relation.attributes.map { |a| a.to_attribute(self) })
     end
   end