diff --git a/configs/kontron_sl28_defconfig b/configs/kontron_sl28_defconfig
index a0c0c3c6a1..a4d9254815 100644
--- a/configs/kontron_sl28_defconfig
+++ b/configs/kontron_sl28_defconfig
@@ -110,6 +110,7 @@ CONFIG_USB_GADGET_DOWNLOAD=y
 # CONFIG_WATCHDOG_AUTOSTART is not set
 CONFIG_WDT=y
 CONFIG_WDT_SL28CPLD=y
+CONFIG_WDT_SP805=y
 CONFIG_OF_LIBFDT_ASSUME_MASK=0x0
 CONFIG_OF_LIBFDT_OVERLAY=y
 CONFIG_EFI_SET_TIME=y