--- ucarp.orig	2009-06-10 01:44:26.000000000 +0000
+++ ucarp	2009-06-10 01:42:27.000000000 +0000
@@ -29,6 +29,10 @@
 	EXTRA_PARAMS="$EXTRA_PARAMS -b $IF_UCARP_ADVBASE"
 fi
 
+if [ -z "$IF_ADDRESS" ]; then
+	IF_ADDRESS="`ifconfig $IFACE | sed -rn 's/^.*inet addr:([0-9.]+) .*/\1/p'`"
+fi
+
 if [ -n "$IF_UCARP_VID" -a -n "$IF_UCARP_VIP" -a \
 		-n "$IF_UCARP_PASSWORD" ]; then
 	$UCARP -i $IFACE -s $IF_ADDRESS -B -z \