diff --git a/package/busybox/busybox.config b/package/busybox/busybox.config
index c28718a725..1ea810e5be 100644
--- a/package/busybox/busybox.config
+++ b/package/busybox/busybox.config
@@ -968,9 +968,9 @@ CONFIG_UDHCPC_DEFAULT_SCRIPT="/usr/share/udhcpc/default.script"
 # CONFIG_FEATURE_UDHCP_PORT is not set
 CONFIG_UDHCP_DEBUG=0
 CONFIG_UDHCPC_SLACK_FOR_BUGGY_SERVERS=80
-# CONFIG_FEATURE_UDHCP_RFC3397 is not set
+CONFIG_FEATURE_UDHCP_RFC3397=y
 CONFIG_FEATURE_UDHCP_8021Q=y
-CONFIG_IFUPDOWN_UDHCPC_CMD_OPTIONS="-R -n"
+CONFIG_IFUPDOWN_UDHCPC_CMD_OPTIONS="-R -n -O search"
 
 #
 # Print Utilities