diff --git a/p4src/headers.p4 b/p4src/headers.p4
index 024eced..e638f1b 100644
--- a/p4src/headers.p4
+++ b/p4src/headers.p4
@@ -128,6 +128,7 @@ struct headers {
 }
 
 struct metadata {
+    bit<16> tcp_length;
     task_t task;
 }