--- net/ipv4/af_inet.c.orig	2003-06-12 21:18:05.000000000 +0200
+++ net/ipv4/af_inet.c	2003-06-12 21:18:41.000000000 +0200
@@ -369,7 +369,7 @@
 			sk->protinfo.af_inet.hdrincl = 1;
 	}
 
-	if (ipv4_config.no_pmtu_disc)
+	if (SOCK_STREAM != sock->type || ipv4_config.no_pmtu_disc)
 		sk->protinfo.af_inet.pmtudisc = IP_PMTUDISC_DONT;
 	else
 		sk->protinfo.af_inet.pmtudisc = IP_PMTUDISC_WANT;