diff --git a/core/modules/system/templates/off-canvas-page-wrapper.html.twig b/core/modules/system/templates/off-canvas-page-wrapper.html.twig
index 11c7f5311d..be48157189 100644
--- a/core/modules/system/templates/off-canvas-page-wrapper.html.twig
+++ b/core/modules/system/templates/off-canvas-page-wrapper.html.twig
@@ -15,12 +15,10 @@
  *
  * Available variables:
  * - children: Contains the child elements of the page.
- *
- * @ingroup themeable
  */
 #}
 {% if children %}
-  <div class="dialog-off-canvas__main-canvas" data-off-canvas-main-canvas >
+  <div class="dialog-off-canvas__main-canvas" data-off-canvas-main-canvas>
     {{ children }}
   </div>
 {% endif %}
diff --git a/core/themes/stable/templates/content/off-canvas-page-wrapper.html.twig b/core/themes/stable/templates/content/off-canvas-page-wrapper.html.twig
index cccd26fe99..3604fd60b8 100644
--- a/core/themes/stable/templates/content/off-canvas-page-wrapper.html.twig
+++ b/core/themes/stable/templates/content/off-canvas-page-wrapper.html.twig
@@ -20,7 +20,7 @@
  */
 #}
 {% if children %}
-  <div class="dialog-off-canvas__main-canvas" data-off-canvas-main-canvas >
+  <div class="dialog-off-canvas__main-canvas" data-off-canvas-main-canvas>
     {{ children }}
   </div>
 {% endif %}