diff --git a/rw-system.sh b/rw-system.sh
index cacda06..0372b10 100644
--- a/rw-system.sh
+++ b/rw-system.sh
@@ -816,9 +816,11 @@ fi
 
 if getprop ro.vendor.build.fingerprint |grep -qiE '^samsung/';then
     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 $f
+        if [ "$(stat -c '%U' "$f")" == "root" ];then
+            chcon u:object_r:sysfs_lcd_writable:s0 $f
+            chmod 0644 $f
+            chown system:system $f
+        fi
     done
 
     setprop persist.sys.phh.fod.samsung true