diff --git a/application/modules/register/models/Activation_model.php b/application/modules/register/models/Activation_model.php
index 40c6e4ae2..f6ed4ff79 100644
--- a/application/modules/register/models/Activation_model.php
+++ b/application/modules/register/models/Activation_model.php
@@ -9,7 +9,7 @@ public function add($username, $password, $email): string
         $key  = sha1($username . $email . $password . time() . $random_string);
 
         $_key = hash('sha256', bin2hex(random_bytes(50)));
-        $_iv  = substr(hash('sha256', bin2hex(random_bytes(50)), 0, 16));
+        $_iv  = substr(hash('sha256', bin2hex(random_bytes(50))), 0, 16);
 
         $data = [
             'username' => $username,