--- a/hooks/syncschema.py	Thu Feb 14 15:38:25 2013 +0100
+++ b/hooks/syncschema.py	Thu Feb 14 16:01:24 2013 +0100
@@ -219,7 +219,7 @@
             repo.set_schema(repo.schema, rebuildinfered=rebuildinfered)
             # CWUser class might have changed, update current session users
             cwuser_cls = self.session.vreg['etypes'].etype_class('CWUser')
-            for session in repo._sessions.values():
+            for session in repo._sessions.itervalues():
                 session.user.__class__ = cwuser_cls
         except Exception:
             self.critical('error while setting schema', exc_info=True)