1 files changed, 4 insertions, 1 deletions
diff --git a/src/message.h b/src/message.h
index d566400..e309f5d 100644
--- a/src/message.h
+++ b/src/message.h
@@ -78,7 +78,7 @@ typedef struct {
 
 typedef struct {
   cmd::cmd_t cmd;
-  
+
   union {
     observe_t observe;
     unobserve_t unobserve;
@@ -90,6 +90,9 @@ typedef struct {
 
   TaskIdList nodes;
 
+  // tagret node id (observed task id) used for transmissions only.
+  taskid_t tid;
+
 } message_t;