diff --git a/libs/debian_service/proto/DebianService.proto b/libs/debian_service/proto/DebianService.proto
index 60f20d4..7ab0af7 100644
--- a/libs/debian_service/proto/DebianService.proto
+++ b/libs/debian_service/proto/DebianService.proto
@@ -31,8 +31,13 @@
   int32 cid = 1;
 }
 
+// TODO(b/382998551): Add more information about the port.
+message ActivePort {
+  int32 port = 1;
+}
+
 message ReportVmActivePortsRequest {
-  repeated int32 ports = 1;
+  repeated ActivePort ports = 1;
 }
 
 message ReportVmActivePortsResponse {