diff --git a/community_server/src/Controller/AppRequestsController.php b/community_server/src/Controller/AppRequestsController.php
index 41552f6dc..4d70a68b1 100644
--- a/community_server/src/Controller/AppRequestsController.php
+++ b/community_server/src/Controller/AppRequestsController.php
@@ -156,7 +156,7 @@ class AppRequestsController extends AppController
         if($required_fields !== true) {
             return $this->returnJson($required_fields);
         }
-        if(!isset($params['memo']) || count($params['memo']) < 5 || count($params['memo']) > 150) {
+        if(!isset($params['memo']) || strlen($params['memo']) < 5 || strlen($params['memo']) > 150) {
             return $this->returnJson(['state' => 'error', 'msg' => 'memo is not set or not in expected range [5;150]']);
         }
         $params['transaction_type'] = 'transfer';