diff --git a/wireguard-install.sh b/wireguard-install.sh
index 55e0571..eed5efc 100644
--- a/wireguard-install.sh
+++ b/wireguard-install.sh
@@ -221,7 +221,7 @@ function newClient() {
 	echo "Tell me a name for the client."
 	echo "The name must consist of alphanumeric character. It may also include an underscore or a dash and can't exceed 15 chars."
 
-	until [[ ${CLIENT_NAME} =~ ^[a-zA-Z0-9_-]+$ && ${CLIENT_EXISTS} == '0' && ${#CLIENT_NAME} < 16 ]]; do
+	until [[ ${CLIENT_NAME} =~ ^[a-zA-Z0-9_-]+$ && ${CLIENT_EXISTS} == '0' && ${#CLIENT_NAME} -lt 16 ]]; do
 		read -rp "Client name: " -e CLIENT_NAME
 		CLIENT_EXISTS=$(grep -c -E "^### Client ${CLIENT_NAME}\$" "/etc/wireguard/${SERVER_WG_NIC}.conf")