diff --git a/setup.cfg b/setup.cfg
index 6340f4f9..b9fadad2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -104,6 +104,7 @@ ceilometer.publisher =
 
 ceilometer.alarm.evaluator =
     threshold = ceilometer.alarm.evaluator.threshold:ThresholdEvaluator
+    combination = ceilometer.alarm.evaluator.combination:CombinationEvaluator
 
 ceilometer.alarm.notifier =
     log = ceilometer.alarm.notifier.log:LogAlarmNotifier