diff --git a/plugins/Observer.py b/plugins/Observer.py
index 45e793690..37bd80493 100644
--- a/plugins/Observer.py
+++ b/plugins/Observer.py
@@ -219,7 +219,8 @@ class Observer(callbacks.Privmsg):
 
         Removes the observer <name>.
         """
-        pass
+        irc.error('Sorry, this hasn\'t been implemented yet.  Complain to '
+                  'jemfinch and he\'ll probably implement it.')