--- a/mod/scheduler/exportlib.php
+++ b/mod/scheduler/exportlib.php
@@ -131,8 +131,10
 
     $pfields = profile_get_custom_fields();
     foreach ($pfields as $id => $field) {
-        $type = $field->datatype;
-        $result[] = new scheduler_profile_field('profile_'.$type, $id, $type);
+        if ($field->visible === PROFILE_VISIBLE_ALL || is_siteadmin()) {
+            $type = $field->datatype;
+            $result[] = new scheduler_profile_field('profile_'.$type, $id, $type);
+        }
     }
 
     $result[] = new scheduler_attended_field();