diff --git a/src/main/proto/netflix/titus/titus_autoscale_api.proto b/src/main/proto/netflix/titus/titus_autoscale_api.proto
index 931fe1b..48690ae 100644
--- a/src/main/proto/netflix/titus/titus_autoscale_api.proto
+++ b/src/main/proto/netflix/titus/titus_autoscale_api.proto
@@ -54,6 +54,8 @@ message AlarmConfiguration {
   // The statistic for the metric associated with the alarm, other than
   // percentile.
   oneof statisticOneof { Statistic statistic = 8; }
+  // The dimensions for the metric specified in MetricName.
+  repeated MetricDimension metricDimensions = 9;
 }
 
 // Describes step adjustment options