diff --git a/instances/templates/instance.html b/instances/templates/instance.html
index c9ebc58..0ae50f4 100644
--- a/instances/templates/instance.html
+++ b/instances/templates/instance.html
@@ -880,7 +880,7 @@
                                                         <form class="form-group" method="post" role="form">{% csrf_token %}
                                                             <div class="checkbox" style="margin-left: 8px;">
                                                                 <label>
-                                                                    <input type="checkbox" name="delete_disk" value="true">
+                                                                    <input type="checkbox" name="delete_disk" checked>
                                                                     <strong>{% trans "Remove Instance's data" %}</strong>
                                                                 </label>
                                                             </div>