diff --git a/p4src/headers.p4 b/p4src/headers.p4
index c388a6e..efadc0c 100644
--- a/p4src/headers.p4
+++ b/p4src/headers.p4
@@ -79,6 +79,7 @@ struct headers {
 }
 
 struct metadata {
+    bit<16> tcp_length;
 }
 
 #endif
\ No newline at end of file
diff --git a/p4src/parsers.p4 b/p4src/parsers.p4
index 8be8c5c..e2b5d54 100644
--- a/p4src/parsers.p4
+++ b/p4src/parsers.p4
@@ -23,7 +23,7 @@ parser MyParser(packet_in packet,
 
     state ipv4 {
         packet.extract(hdr.ipv4);
-		meta.tcpLength = hdr.ipv4.totalLen - 16w20;
+		meta.tcp_length = hdr.ipv4.totalLen - 16w20;
 
         transition select(hdr.ipv4.protocol){
             TYPE_TCP: tcp;
@@ -33,7 +33,7 @@ parser MyParser(packet_in packet,
 
     state ipv6 {
         packet.extract(hdr.ipv6);
-		meta.tcpLength = hdr.ipv6.payload_length;
+		meta.tcp_length = hdr.ipv6.payload_length;
 
         transition select(hdr.ipv6.next_header){
             TYPE_TCP: tcp;