diff --git a/metadata.graphqls b/metadata.graphqls
index cd94a53d4a76c9b4bf3422fe19e96cea4a8c75ef..e0774e7e99ac11dda8f967576203af0b0f6e7a53 100644
--- a/metadata.graphqls
+++ b/metadata.graphqls
@@ -51,7 +51,7 @@ extend type Query {
     # Service related meta info.
     getAllServices(duration: Duration!): [Service!]!
     searchServices(duration: Duration!, keyword: String!): [Service!]!
-    searchService(duration: Duration!, serviceCode: String!): Service
+    searchService(serviceCode: String!): Service
 
     # Service intance query
     getServiceInstances(duration: Duration!, id: ID!): [ServiceInstance!]!