diff --git a/tabellio/searchform/form.py b/tabellio/searchform/form.py
index 9099cbb..5c751d4 100644
--- a/tabellio/searchform/form.py
+++ b/tabellio/searchform/form.py
@@ -307,7 +307,7 @@ def possible_polgroups(context):
         else:
             inactive_groups.append(SimpleVocabulary.createTerm(polgroup_id, polgroup_id, polgroup_str))
     # keep active groups ordered by their position
-    inactive_groups.sort(cmp_term)
+    inactive_groups.sort(lambda x,y: cmp(x.value, y.value))
     return SimpleVocabulary(active_groups + inactive_groups)
 
 @grok.provider(IContextSourceBinder)