diff --git a/update_engine.rc b/update_engine.rc
index a7d6235..90ca4c6 100644
--- a/update_engine.rc
+++ b/update_engine.rc
@@ -1,7 +1,7 @@
 service update_engine /system/bin/update_engine --logtostderr --logtofile --foreground
     class late_start
     user root
-    group root system wakelock inet cache
+    group root system wakelock inet cache media_rw
     writepid /dev/cpuset/system-background/tasks
     disabled