1 files changed, 3 insertions, 1 deletions

diff --git a/lib/libalias/alias.c b/lib/libalias/alias.c
index 154cf4e88a8b..320c5c287a4b 100644
--- a/lib/libalias/alias.c
+++ b/lib/libalias/alias.c
@@ -1058,12 +1058,14 @@ TcpAliasOut(struct ip *pip, int maxpacketsize)
         u_short *sptr;
 
 /* Save original destination address, if this is a proxy packet.
-   Also modify packet to include destination encoding. */
+   Also modify packet to include destination encoding.  This may
+   change the size of IP header. */
         if (proxy_type != 0)
         {
             SetProxyPort(link, dest_port);
             SetProxyAddress(link, dest_address);
             ProxyModify(link, pip, maxpacketsize, proxy_type);
+            tc = (struct tcphdr *) ((char *) pip + (pip->ip_hl << 2));
         }
 
 /* Get alias address and port */