diff --git a/openwrt/viirb-2-configure.sh b/openwrt/viirb-2-configure.sh
index c9ada76..093d547 100755
--- a/openwrt/viirb-2-configure.sh
+++ b/openwrt/viirb-2-configure.sh
@@ -17,7 +17,7 @@ id=$1; shift
 hex_id=$(printf "%0.2x\n" "$id")
 viirb_hostname=viirb${id}
 
-prefix_base=2a0a:e5c1:6
+prefix_base=2a0a:e5c1:3
 my_prefix=${prefix_base}${hex_id}
 my_network=${my_prefix}::/48