diff --git a/arch/mips/configs/cavium_octeon_defconfig b/arch/mips/configs/cavium_octeon_defconfig
index d470d08362c009ea2182d9021e3cb60155c9cf6f..31e3c4d9adb02a890711592d00113a5ce355f35a 100644
--- a/arch/mips/configs/cavium_octeon_defconfig
+++ b/arch/mips/configs/cavium_octeon_defconfig
@@ -45,6 +45,7 @@ CONFIG_SYN_COOKIES=y
 # CONFIG_INET_LRO is not set
 CONFIG_IPV6=y
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_DEVTMPFS=y
 # CONFIG_FW_LOADER is not set
 CONFIG_MTD=y
 # CONFIG_MTD_OF_PARTS is not set