1 files changed, 1 insertions, 1 deletions

diff --git a/lib/sqlalchemy/objectstore.py b/lib/sqlalchemy/objectstore.py
index 9b414f181..6081a7150 100644
--- a/lib/sqlalchemy/objectstore.py
+++ b/lib/sqlalchemy/objectstore.py
@@ -52,7 +52,7 @@ def get_row_key(row, class_, table, primary_keys):
     may be synonymous with the table argument or can be a larger construct containing that table.
     return value: a tuple object which is used as an identity key.
     """
-    return (class_, table, tuple([row[column.label] for column in primary_keys]))
+    return (class_, table, tuple([row[column] for column in primary_keys]))
 
 def begin():
     """begins a new UnitOfWork transaction.  the next commit will affect only