--- configure.ac~	2010-08-23 16:18:33.000000000 +0100
+++ configure.ac	2010-08-23 16:29:37.578000313 +0100
@@ -381,6 +381,7 @@
 	AC_MSG_WARN([Falling back to ISC dhclient, ${DHCLIENT_PATH}])
 fi
 AC_SUBST(DHCLIENT_PATH)
+AC_SUBST(DHCLIENT_VERSION)
 AC_SUBST(DHCPCD_PATH)
 
 # resolvconf support