diff --git a/mod/lti/db/services.php b/mod/lti/db/services.php
index 02d24ad5c02..c90397a9a24 100644
--- a/mod/lti/db/services.php
+++ b/mod/lti/db/services.php
@@ -49,7 +49,7 @@ $functions = array(
         'classname'     => 'mod_lti_external',
         'methodname'    => 'view_lti',
         'description'   => 'Trigger the course module viewed event and update the module completion status.',
-        'type'          => 'write',
+        'type'          => 'read',
         'capabilities'  => 'mod/lti:view',
         'services'      => array(MOODLE_OFFICIAL_MOBILE_SERVICE)
     ),