diff --git a/update.go b/update.go
index cda7c26..95aca61 100644
--- a/update.go
+++ b/update.go
@@ -148,6 +148,7 @@ func initUpdate() error {
 	}
 
 	http.HandleFunc("/update/boot", nonConcurrentUpdateHandler(mustFindRootDevice()+"1"))
+	http.HandleFunc("/update/mbr", nonConcurrentUpdateHandler(mustFindRootDevice()))
 	http.HandleFunc("/update/root", nonConcurrentUpdateHandler(mustFindRootDevice()+inactiveRootPartition))
 	http.HandleFunc("/update/switch", nonConcurrentSwitchHandler(inactiveRootPartition))
 	// bakery updates only the boot partition, which would reset the active root