diff --git a/master.cfg b/master.cfg
index c2d692d..0cb965c 100644
--- a/master.cfg
+++ b/master.cfg
@@ -645,6 +645,7 @@ def load_config (c):
     for s in config['schedulers']:
         if "change_filter" in s:
             s['change_filter'] = globals ()[s['change_filter']]
+        s['treeStableTimer'] = None
         kls = globals ()[s.pop ('type')]
         s = dict (map (lambda key_value_pair : (str (key_value_pair[0]),
                                                 key_value_pair[1]),
@@ -661,7 +662,6 @@ def load_config (c):
         factory = globals ()[ "RunTestGDB%s" % btype ]
         b['factory'] = factory (arch_triplet)
         b['canStartBuild'] = DefaultGDBCanStartBuild
-        b['treeStableTimer'] = None
         c['builders'].append (b)
 
 load_config (c)