diff --git a/apm-protocol/apm-ui-protocol/src/main/resources/ui-graphql/trace.graphqls b/apm-protocol/apm-ui-protocol/src/main/resources/ui-graphql/trace.graphqls
index d5e2de8f3639e1796dc2bd1f0e98a0a116289326..71e214b8e42dcbd4986f4ffd08531083a1eed4f3 100644
--- a/apm-protocol/apm-ui-protocol/src/main/resources/ui-graphql/trace.graphqls
+++ b/apm-protocol/apm-ui-protocol/src/main/resources/ui-graphql/trace.graphqls
@@ -43,6 +43,7 @@ type Span {
   spanId: Int!
   parentSpanId: Int!
   refs: [Ref!]!
+  applicationCode: String!
   startTime: Long!
   endTime: Long!
   operationName: String