diff --git a/lib/editorlib.php b/lib/editorlib.php
index 645073ca58a..fbafa1a5a47 100644
--- a/lib/editorlib.php
+++ b/lib/editorlib.php
@@ -33,7 +33,12 @@ defined('MOODLE_INTERNAL') || die();
  * @return texteditor object
  */
 function editors_get_preferred_editor($format = NULL) {
-    global $USER;
+    global $USER, $CFG;
+
+    if (!empty($CFG->adminsetuppending)) {
+        // Must not use other editors before install completed!
+        return get_texteditor('textarea');
+    }
 
     $enabled = editors_get_enabled();