diff --git a/script-functions b/script-functions
index fe1f35d5..102dcf71 100644
--- a/script-functions
+++ b/script-functions
@@ -21,8 +21,7 @@ ask_ok() {
 }
 
 is_root() {
-    user=$(whoami)
-    [[ $user != "root" ]] && echo "Script must be run with sudo" && exit 1
+    [[ $EUID -gt 0 ]] && echo "Script must be run with sudo" && exit 1
 }
 
 copy_manual() {
diff --git a/script-user-reset-display b/script-user-reset-display
index 6487e85b..c75bcfae 100755
--- a/script-user-reset-display
+++ b/script-user-reset-display
@@ -9,7 +9,7 @@ parent=${parent%/*}
 
 echo "This script will only work for the current user"
 
-is_root && echo "Do not run as root (do not use sudo)" && exit 1
+[[ $EUID -eq 0 ]] && echo "Do not run as root (do not use sudo)" && exit 1
 
 to_reset=(
   /org/mate/panel/