diff --git a/quicktabs.admin.inc b/quicktabs.admin.inc
index 5c505f4..d681f77 100644
--- a/quicktabs.admin.inc
+++ b/quicktabs.admin.inc
@@ -97,7 +97,10 @@ function quicktabs_form($form, $form_state, $formtype, $qt = NULL) {
     $form_state['num_tabs']--;
   }
 
-  $tab_titles = array();
+  $tab_titles = array(
+    QUICKTABS_DELTA_NONE => t('- None -'),
+  );
+
   // Add current tabs to the form.
   foreach ($qt->tabs as $delta => $tab) {
     $tab['delta'] = $delta;
diff --git a/quicktabs.classes.inc b/quicktabs.classes.inc
index 6dfe148..56c2569 100644
--- a/quicktabs.classes.inc
+++ b/quicktabs.classes.inc
@@ -244,7 +244,7 @@ class QuickSet {
   public function getActiveTab() {
     $active_tab = isset($this->settings['default_tab']) ? $this->settings['default_tab'] : key($this->contents);
     $active_tab = isset($_GET['qt-' . $this->name]) ? $_GET['qt-' . $this->name] : $active_tab;
-    $active_tab = (isset($active_tab) && isset($this->contents[$active_tab])) ? $active_tab : 0;
+    $active_tab = (isset($active_tab) && isset($this->contents[$active_tab])) ? $active_tab : QUICKTABS_DELTA_NONE;
     return $active_tab;
   }
 }
diff --git a/quicktabs.module b/quicktabs.module
index 2278686..05b1f39 100644
--- a/quicktabs.module
+++ b/quicktabs.module
@@ -1,4 +1,5 @@
 <?php
+define('QUICKTABS_DELTA_NONE', 999999);
 
 /**
  * Implements hook_help().