diff --git a/target/linux/ath79/base-files/lib/upgrade/platform.sh b/target/linux/ath79/base-files/lib/upgrade/platform.sh
index b2b55e64e3..88c09410e7 100644
--- a/target/linux/ath79/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ath79/base-files/lib/upgrade/platform.sh
@@ -212,13 +212,3 @@ platform_do_upgrade() {
 		;;
 	esac
 }
-
-disable_watchdog() {
-	killall watchdog
-	( ps | grep -v 'grep' | grep '/dev/watchdog' ) && {
-		echo 'Could not disable watchdog'
-		return 1
-	}
-}
-
-append sysupgrade_pre_upgrade disable_watchdog