--- a/dataimport/importer.py	Fri Oct 16 17:04:30 2015 +0200
+++ b/dataimport/importer.py	Fri Oct 16 17:06:12 2015 +0200
@@ -69,7 +69,7 @@
     def use_extid_as_cwuri_filter(extentities):
         for extentity in extentities:
             if extentity.extid not in extid2eid:
-                extentity.values.setdefault('cwuri', set([unicode(extentity.extid)]))
+                extentity.values.setdefault('cwuri', set([extentity.extid.decode('utf-8')]))
             yield extentity
     return use_extid_as_cwuri_filter