diff --git a/src/vppinfra/unix-formats.c b/src/vppinfra/unix-formats.c
index 678700e..af1eb1a 100644
--- a/src/vppinfra/unix-formats.c
+++ b/src/vppinfra/unix-formats.c
@@ -316,13 +316,10 @@
   struct iphdr * ip = (void *) p;
   struct udphdr * udp = (void *) (ip + 1);
 
-  u16 source = udp->uh_sport;
-  u16 dest = udp->uh_dport;
-
   s = format (s, "udp %U:%U -> %U:%U", format_network_address, AF_INET,
-	      &ip->saddr, format_network_port, IPPROTO_UDP, ntohs (source),
-	      format_network_address, AF_INET, &ip->daddr, format_network_port,
-	      IPPROTO_UDP, ntohs (dest));
+	      &ip->saddr, format_network_port, IPPROTO_UDP,
+	      ntohs (udp->source), format_network_address, AF_INET, &ip->daddr,
+	      format_network_port, IPPROTO_UDP, ntohs (udp->dest));
 
   return s;
 }