diff --git a/backend/app/plugins/wiaas/includes/api/class-wiaas-rest-customer.php b/backend/app/plugins/wiaas/includes/api/class-wiaas-rest-customer.php
index af8d977..48d7ddb 100644
--- a/backend/app/plugins/wiaas/includes/api/class-wiaas-rest-customer.php
+++ b/backend/app/plugins/wiaas/includes/api/class-wiaas-rest-customer.php
@@ -114,7 +114,7 @@ class Wiaas_REST_Customer_API {
 		$phone = $params['phone'];
 		$name = $first_name . ' ' . $last_name;
 
-		if (!is_string($name) || strlen($name) < 1){
+		if (!is_string($name) || strlen($name) === 1){
 			return self::generate_wiaas_response('ADD_NAME', 'error', Wiaas_Customer::get_customer_info($customer_id));
 		}