diff --git a/alarm.graphqls b/alarm.graphqls
index 15e324b..9edad3d 100644
--- a/alarm.graphqls
+++ b/alarm.graphqls
@@ -21,7 +21,7 @@ type AlarmTrend {
 
 type AlarmMessage {
     startTime: Long!
-    scope: Scope!
+    scope: Scope
     id: ID!
     message: String!
 }