diff --git a/plugins/Services/plugin.py b/plugins/Services/plugin.py
index 5265793ae..8e16520be 100644
--- a/plugins/Services/plugin.py
+++ b/plugins/Services/plugin.py
@@ -347,7 +347,8 @@ class Services(callbacks.Plugin):
                                  'I can send commands to ChanServ.', command)
             else:
                 irc.error('You must set supybot.plugins.Services.ChanServ '
-                          'before I\'m able to do get voiced.', Raise=True)
+                          'before I\'m able to send the %s command.' % command,
+                          Raise=True)
 
     def op(self, irc, msg, args, channel):
         """[<channel>]