diff --git a/library/Icingadb/Common/CommandActions.php b/library/Icingadb/Common/CommandActions.php
index af7d19428..eb161995f 100644
--- a/library/Icingadb/Common/CommandActions.php
+++ b/library/Icingadb/Common/CommandActions.php
@@ -215,6 +215,7 @@ protected function handleApiRequest(CommandForm $form)
         });
 
         $form->handleRequest($this->getServerRequest());
+        $this->assertHttpMethod($form->getMethod());
 
         $errors = [];
         foreach ($form->getElements() as $element) {