diff --git a/rootdir/init.rc b/rootdir/init.rc
index 8ffac2049..6771c5fde 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -1128,9 +1128,9 @@ on boot
 
     # System server manages zram writeback
     chown root system /sys/block/zram0/idle
-    chmod 0664 /sys/block/zram0/idle
+    chmod 0220 /sys/block/zram0/idle
     chown root system /sys/block/zram0/writeback
-    chmod 0664 /sys/block/zram0/writeback
+    chmod 0220 /sys/block/zram0/writeback
 
     # to access F2FS sysfs on dm-<num> directly
     mkdir /dev/sys/fs/by-name 0755 system system