diff -up dhcp-4.1.0/common/dispatch.c.dracut dhcp-4.1.0/common/dispatch.c
--- dhcp-4.1.0/common/dispatch.c.dracut	2008-01-23 16:43:04.000000000 -1000
+++ dhcp-4.1.0/common/dispatch.c	2009-06-25 16:21:03.000000000 -1000
@@ -104,6 +104,10 @@ void add_timeout (when, where, what, ref
 {
 	struct timeout *t, *q;
 
+	if (when == NULL) {
+		return;
+	}
+
 	/* See if this timeout supersedes an existing timeout. */
 	t = (struct timeout *)0;
 	for (q = timeouts; q; q = q -> next) {