diff -r c170ec8a4525 -r f13ae1fea212 server/sources/__init__.py
--- a/server/sources/__init__.py	Fri Mar 28 14:59:33 2014 +0100
+++ b/server/sources/__init__.py	Fri Apr 04 14:48:51 2014 +0200
@@ -451,7 +451,7 @@
 
 
     @deprecated('[3.13] use extid2eid(source, value, etype, session, **kwargs)')
-    def extid2eid(self, value, etype, session=None, **kwargs):
+    def extid2eid(self, value, etype, session, **kwargs):
         return self.repo.extid2eid(self, value, etype, session, **kwargs)