diff --git a/openair2/ENB_APP/MESSAGES/V2/header.proto b/openair2/ENB_APP/MESSAGES/V2/header.proto
index b2319c8220..5670b9bd77 100644
--- a/openair2/ENB_APP/MESSAGES/V2/header.proto
+++ b/openair2/ENB_APP/MESSAGES/V2/header.proto
@@ -15,5 +15,8 @@ enum prp_type {
      // Statistics and measurement messages
      PRPT_STATS_REQUEST = 3;
      PRPT_STATS_REPLY = 4;
+
+     //Asynchronous messages
+     PRPT_UL_SR_INFO = 5;
 }