diff --git a/src/ircdb.py b/src/ircdb.py
index 807f3c7f8..2e43b5461 100644
--- a/src/ircdb.py
+++ b/src/ircdb.py
@@ -321,6 +321,7 @@ class UsersDictionary(object):
         s = fd.read()
         fd.close()
         Set = sets.Set
+        ignore(Set) # Make PyChecker happy.
         self.dict = eval(normalize(s))
         self.cache = {} # hostmasks to nicks.
         self.revcache = ircutils.IrcDict() # nicks to hostmasks.