diff -r 94cc7cad3d2d -r b9436fe77c9e schema.py
--- a/schema.py	Thu Dec 03 17:17:43 2009 +0100
+++ b/schema.py	Mon Dec 07 05:09:09 2009 -0800
@@ -527,6 +527,7 @@
                 self._eid_index[rdef.eid] = rdefs
             except AttributeError:
                 pass # not a serialized schema
+        return rdefs
 
     def del_relation_type(self, rtype):
         rschema = self.rschema(rtype)