diff --git a/src/conf.py b/src/conf.py
index 5b5b46672..9163e934b 100644
--- a/src/conf.py
+++ b/src/conf.py
@@ -671,6 +671,13 @@ registerGlobalValue(supybot.protocols.irc.ping, 'interval',
     registry.Integer(120, """Determines the number of seconds between sending
     pings to the server, if pings are being sent to the server."""))
 
+registerGlobalValue(supybot.protocols.irc, 'queueDuplicateMessages',
+    registry.Boolean(False, """Determines whether the bot will allow duplicate
+    messages to be queued for delivery to the server.  This is a safety
+    mechanism put in place to prevent plugins from sending the same message
+    multiple times; most of the time it doesn't matter, but when it does, you'll
+    probably want it to disallowed."""))
+
 ###
 # supybot.protocols.http
 ###