diff --git a/actionpack/lib/action_controller/session/active_record_store.rb b/actionpack/lib/action_controller/session/active_record_store.rb
index 36896d36d8..a653947038 100644
--- a/actionpack/lib/action_controller/session/active_record_store.rb
+++ b/actionpack/lib/action_controller/session/active_record_store.rb
@@ -52,7 +52,7 @@ def reloadable? #:nodoc:
           end
           
           def data_column_size_limit
-            connection.columns(table_name).find {|column| column.name == 'data'}.limit
+            columns_hash['data'].limit
           end
 
           # Hook to set up sessid compatibility.