diff --git a/controller/schema/dgraph_schema_store.go b/controller/schema/dgraph_schema_store.go
index 941a16b..304ee5d 100644
--- a/controller/schema/dgraph_schema_store.go
+++ b/controller/schema/dgraph_schema_store.go
@@ -27,7 +27,7 @@
 const eventTmpl = `
 type %sEvent {
   id: ID!
-  state: EventState!
+  state: EventState! @search(by: [exact])
   node: %s! @hasInverse(field: events)
 }