diff --git a/protos/openolt.proto b/protos/openolt.proto
index 1140748..87515f9 100644
--- a/protos/openolt.proto
+++ b/protos/openolt.proto
@@ -175,6 +175,7 @@
     fixed32 intf_id = 1;
     fixed32 onu_id = 2;
     SerialNumber serial_number = 3;
+    fixed32 pir = 4;   // peak information rate assigned to onu
 }
 
 message OmciMsg {