diff -u b/includes/bootstrap.inc b/includes/bootstrap.inc
--- b/includes/bootstrap.inc
+++ b/includes/bootstrap.inc
@@ -931,7 +931,7 @@
       $missing[$type][$name] = TRUE;
       cache_set('drupal_get_filename:missing', $missing, 'cache', REQUEST_TIME + 24 * 60 * 60);
     }
-    trigger_error(t('The following @type is missing from the file system: @name.', array('@type' => $type, '@name' => $name)), E_USER_WARNING);
+    trigger_error(t('The following @type is missing from the file system: @name. For more information, see <a href="@documentation">the documentation page</a>.', array('@type' => $type, '@name' => $name, '@documentation' => 'https://www.drupal.org/node/2487215')), E_USER_WARNING);
   }
 }