diff --git a/update_engine.rc b/update_engine.rc
index 499a8f6..62bbcc7 100644
--- a/update_engine.rc
+++ b/update_engine.rc
@@ -2,3 +2,4 @@
     class late_start
     user root
     group root system wakelock dbus inet
+    writepid /dev/cpuset/system-background/tasks