diff --git a/proto/context.proto b/proto/context.proto
index 6261d1819a15462519819c71267b6b1430cf18d9..3104f1b545c02bab71c8638ebba03efdcbfe71ff 100644
--- a/proto/context.proto
+++ b/proto/context.proto
@@ -175,6 +175,7 @@ message Device {
   repeated DeviceDriverEnum device_drivers = 6;
   repeated EndPoint device_endpoints = 7;
   repeated Component component = 8; // Used for inventory
+  DeviceId controller_id = 9; // Identifier of node controlling the actual device
 }
 
 message Component {