diff --git a/meta-ast2400/recipes-kernel/linux/linux-obmc/defconfig b/meta-ast2400/recipes-kernel/linux/linux-obmc/defconfig
index 74d9343..ed1c470 100644
--- a/meta-ast2400/recipes-kernel/linux/linux-obmc/defconfig
+++ b/meta-ast2400/recipes-kernel/linux/linux-obmc/defconfig
@@ -219,6 +219,7 @@
 CONFIG_FUNCTION_TRACER=y
 # CONFIG_TRACING_EVENTS_GPIO is not set
 CONFIG_DEBUG_USER=y
+CONFIG_WATCHDOG_SYSFS=y
 # CONFIG_CRYPTO_ECHAINIV is not set
 # CONFIG_CRYPTO_HW is not set
 # CONFIG_XZ_DEC_X86 is not set
diff --git a/meta-ast2500/recipes-kernel/linux/linux-obmc/defconfig b/meta-ast2500/recipes-kernel/linux/linux-obmc/defconfig
index 8b7c57c..5183a7f 100755
--- a/meta-ast2500/recipes-kernel/linux/linux-obmc/defconfig
+++ b/meta-ast2500/recipes-kernel/linux/linux-obmc/defconfig
@@ -225,6 +225,7 @@
 CONFIG_FUNCTION_TRACER=y
 # CONFIG_TRACING_EVENTS_GPIO is not set
 CONFIG_DEBUG_USER=y
+CONFIG_WATCHDOG_SYSFS=y
 # CONFIG_CRYPTO_ECHAINIV is not set
 # CONFIG_CRYPTO_HW is not set
 # CONFIG_XZ_DEC_X86 is not set