--- a/target/linux/ixp4xx-2.6/config/default
+++ b/target/linux/ixp4xx-2.6/config/default
@@ -170,6 +170,7 @@
 # CONFIG_IKCONFIG is not set
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_INPUT=m
+CONFIG_INPUT_IXP4XX_BEEPER=m
 # CONFIG_IP6_NF_MANGLE is not set
 # CONFIG_IP6_NF_MATCH_EUI64 is not set
 # CONFIG_IP6_NF_MATCH_FRAG is not set