diff --git a/master.cfg b/master.cfg
index ab90487..3a189c9 100644
--- a/master.cfg
+++ b/master.cfg
@@ -568,7 +568,7 @@ mn = MyMailNotifier(fromaddr = GDB_MAIL_FROM,
                                                                      'got_revision') })
 
 class LookupEmailTryBuild (object):
-    implements (interfaces.IEmailLookup)
+    implements (IEmailLookup)
 
     def getAddress (self, name):
         # List of [ dir, sorted_reverse ]