diff --git a/rattail/pyramid/grids/alchemy.py b/rattail/pyramid/grids/alchemy.py
index 39947b6f..e6bd78c1 100644
--- a/rattail/pyramid/grids/alchemy.py
+++ b/rattail/pyramid/grids/alchemy.py
@@ -36,7 +36,7 @@ from edbob.util import prettify
 
 from rattail.pyramid.grids.core import Grid
 from rattail.pyramid import Session
-
+from sqlalchemy.orm import object_session
 
 __all__ = ['AlchemyGrid']
 
@@ -92,7 +92,7 @@ class AlchemyGrid(Grid):
 
     def iter_rows(self):
         for row in self._formalchemy_grid.rows:
-            self._formalchemy_grid._set_active(row)
+            self._formalchemy_grid._set_active(row, object_session(row))
             yield row
 
     def page_count_options(self):