diff --git a/bin/osv/orm.py b/bin/osv/orm.py
index bd7c13b3646..24a116d3536 100644
--- a/bin/osv/orm.py
+++ b/bin/osv/orm.py
@@ -2862,7 +2862,7 @@ class orm(orm_template):
                         return "COALESCE(%s.write_date, %s.create_date, now())::timestamp AS %s" % (self._table, self._table, f,)
                     return "now()::timestamp AS %s" % (f,)
                 if isinstance(self._columns[f], fields.binary) and context.get('bin_size', False):
-                    return 'length("%s") as "%s"' % (f_qual, f)
+                    return 'length(%s) as "%s"' % (f_qual, f)
                 return f_qual
 
             fields_pre2 = map(convert_field, fields_pre)