diff --git a/coremods/service_support.py b/coremods/service_support.py
index 32e6075..93ec013 100644
--- a/coremods/service_support.py
+++ b/coremods/service_support.py
@@ -50,7 +50,9 @@ def spawn_service(irc, source, command, args):
 
     # TODO: channels should be tracked in a central database, not hardcoded
     # in conf.
-    for chan in irc.serverdata['channels']:
+    channels = set(irc.serverdata.get('channels', [])) | sbot.extra_channels
+
+    for chan in channels:
         irc.proto.join(u, chan)
 
 utils.add_hook(spawn_service, 'PYLINK_NEW_SERVICE')
diff --git a/utils.py b/utils.py
index 664db5b..632ed20 100644
--- a/utils.py
+++ b/utils.py
@@ -148,7 +148,7 @@ def getDatabaseName(dbname):
 
 class ServiceBot():
     def __init__(self, name, default_help=True, default_request=False, default_list=True,
-                 nick=None, ident=None, manipulatable=False):
+                 nick=None, ident=None, manipulatable=False, extra_channels=set()):
         # Service name
         self.name = name
 
@@ -168,6 +168,10 @@ class ServiceBot():
         # spawned.
         self.uids = {}
 
+        # Track what channels other than those defined in the config
+        # that the bot should join by default.
+        self.extra_channels = extra_channels
+
         if default_help:
             self.add_cmd(self.help)