diff --git a/admin/settings/development.php b/admin/settings/development.php
index e31a4542903..41d779fca7b 100644
--- a/admin/settings/development.php
+++ b/admin/settings/development.php
@@ -14,7 +14,7 @@ if ($hassiteconfig) { // speedup for non-admins, add all caps used on this page
 
     $temp->add(new admin_setting_configcheckbox('dndallowtextandlinks', new lang_string('dndallowtextandlinks', 'admin'), new lang_string('configdndallowtextandlinks', 'admin'), 0));
 
-    $temp->add(new admin_setting_configexecutable('pathtosassc', new lang_string('pathtosassc', 'admin'), new lang_string('pathtosassc_help', 'admin'), null));
+    $temp->add(new admin_setting_configexecutable('pathtosassc', new lang_string('pathtosassc', 'admin'), new lang_string('pathtosassc_help', 'admin'), ''));
 
     $ADMIN->add('experimental', $temp);