diff --git a/modules/rest_api/controllers/services/rest.php b/modules/rest_api/controllers/services/rest.php
index 1cd215f83a..443ea92fd1 100644
--- a/modules/rest_api/controllers/services/rest.php
+++ b/modules/rest_api/controllers/services/rest.php
@@ -639,8 +639,7 @@ public function __call($name, $arguments) {
           elseif ($this->method === 'POST') {
             $this->request = $_POST;
           }
-
-          $methodName = lcfirst(ucwords($name, '-')) . ucfirst(strtolower($this->method));
+          $methodName = lcfirst(str_replace('_', '', ucwords($name, '_'))) . ucfirst(strtolower($this->method));
           $this->checkVersion($arguments);
 
           $requestForId = NULL;