diff --git a/rw-system.sh b/rw-system.sh
index f9ef9ce..9e8a4c6 100644
--- a/rw-system.sh
+++ b/rw-system.sh
@@ -709,10 +709,11 @@ fi
 
 if getprop ro.vendor.build.fingerprint |grep -qiE '^samsung/';then
     if ls -lZ /sys/class/lcd/panel/mask_brightness |grep -q u:object_r:sysfs:s0;then
-        chcon u:object_r:sysfs_lcd_writable:s0 /sys/class/lcd/panel/actual_mask_brightness
-        chcon u:object_r:sysfs_lcd_writable:s0 /sys/class/lcd/panel/mask_brightness
-        chcon u:object_r:sysfs_lcd_writable:s0 /sys/class/lcd/panel/device/backlight/panel/brightness
-        chcon u:object_r:sysfs_lcd_writable:s0 /sys/class/backlight/panel0-backlight/brightness
+        for f in /sys/class/lcd/panel/actual_mask_brightness /sys/class/lcd/panel/mask_brightness /sys/class/lcd/panel/device/backlight/panel/brightness /sys/class/backlight/panel0-backlight/brightness;do
+            chcon u:object_r:sysfs_lcd_writable:s0 $f
+            chmod 0644 $f
+            chown system:system $f
+        done
     fi
 
     setprop persist.sys.phh.fod.samsung true