diff --git a/activerecord/lib/active_record/aggregations.rb b/activerecord/lib/active_record/aggregations.rb
index 8cd7389..94056ec 100644
--- a/activerecord/lib/active_record/aggregations.rb
+++ b/activerecord/lib/active_record/aggregations.rb
@@ -230,8 +230,8 @@ module ActiveRecord
                 instance_variable_set("@#{name}", nil)
               end
 
-              if (instance_variable_get("@#{name}").nil? || force_reload) && (!allow_nil || mapping.any? {|pair| !read_attribute(pair.first).nil? })
-                attrs = mapping.collect {|pair| read_attribute(pair.first)}
+              if (instance_variable_get("@#{name}").nil? || force_reload) && (!allow_nil || mapping.any? {|pair| !self.send(pair.first).nil? })
+                attrs = mapping.collect {|pair| self.send(pair.first)}
                 object = case constructor
                   when Symbol
                     class_name.constantize.send(constructor, *attrs)