diff --git a/p4src/headers.p4 b/p4src/headers.p4
index 8afc5ec..9d500f5 100644
--- a/p4src/headers.p4
+++ b/p4src/headers.p4
@@ -8,7 +8,7 @@
 typedef bit<48>  mac_addr_t;
 typedef bit<32>  ipv4_addr_t;
 typedef bit<128> ipv6_addr_t;
-typedef bit<9>   port_t;
+typedef bit<16>  port_t;
 typedef bit<16>  mcast_t;
 typedef bit<8>   task_t;