diff --git a/panels_ipe/plugins/display_renderers/panels_renderer_ipe.class.php b/panels_ipe/plugins/display_renderers/panels_renderer_ipe.class.php
index fad0592..e25bcf9 100644
--- a/panels_ipe/plugins/display_renderers/panels_renderer_ipe.class.php
+++ b/panels_ipe/plugins/display_renderers/panels_renderer_ipe.class.php
@@ -29,7 +29,7 @@ class panels_renderer_ipe extends panels_renderer_editor {
       '#type' => 'link',
       '#title' => t('Customize this page'),
       '#href' => $this->get_url('save_form'),
-      '#id' => 'panels-ipe-customize-page',
+      '#id' => drupal_html_id('panels-ipe-customize-page'),
       '#attributes' => array(
         'class' => array('panels-ipe-startedit', 'panels-ipe-pseudobutton'),
       ),