diff --git a/apm-network/src/main/proto/TraceSegmentService.proto b/apm-network/src/main/proto/TraceSegmentService.proto
index 000ca8a7d..31af71946 100644
--- a/apm-network/src/main/proto/TraceSegmentService.proto
+++ b/apm-network/src/main/proto/TraceSegmentService.proto
@@ -52,6 +52,7 @@ enum SpanLayer {
     Database = 0;
     RPCFramework = 1;
     Http = 2;
+    MQ = 3;
 }
 
 message KeyValue {