diff --git a/install.sh b/install.sh
index f0974b4..61d6015 100755
--- a/install.sh
+++ b/install.sh
@@ -32,7 +32,7 @@ if [[ "$1" != "all" ]] && [[ "$1" != "client" ]] && [[ "$1" != "server" ]]; then
 	exit
 fi
 
-if [ $UID -ne 0 ]; then
+if [ $(id -u) -ne 0 ]; then
 	echo "ERROR: This script must be run as root."
 	exit 1
 fi