diff --git a/u-boot/include/configs/carambola2.h b/u-boot/include/configs/carambola2.h
index 64563ca53f..2b22ee5bda 100644
--- a/u-boot/include/configs/carambola2.h
+++ b/u-boot/include/configs/carambola2.h
@@ -7,6 +7,10 @@
 
 #include <configs/ar7240.h>
 #include <config.h>
+
+/* enable watchdog */
+#define CONFIG_HW_WATCHDOG
+
 /*-----------------------------------------------------------------------
  * FLASH and environment organization
  *-----------------------------------------------------------------------
diff --git a/u-boot/include/configs/skylab.h b/u-boot/include/configs/skylab.h
index 5ec91e6c2b..1f0a337b77 100644
--- a/u-boot/include/configs/skylab.h
+++ b/u-boot/include/configs/skylab.h
@@ -7,6 +7,10 @@
 
 #include <configs/ar7240.h>
 #include <config.h>
+
+/* enable watchdog */
+#define CONFIG_HW_WATCHDOG
+
 /*-----------------------------------------------------------------------
  * FLASH and environment organization
  *-----------------------------------------------------------------------