--- dhcp-4.3.6/includes/site.h.bak	2019-09-03 09:41:12.816000000 -0400
+++ dhcp-4.3.6/includes/site.h	2019-09-03 09:55:03.308000000 -0400
@@ -286,7 +286,7 @@
    is a host address and doesn't include any on-link information.
    64 indicates that the first 64 bits are the subnet or on-link
    prefix. */
-#define DHCLIENT_DEFAULT_PREFIX_LEN 64
+#define DHCLIENT_DEFAULT_PREFIX_LEN 128
 
 /* Enable the gentle shutdown signal handling.  Currently this
    means that on SIGINT or SIGTERM a client will release its
