diff --git a/blockgroup.module b/blockgroup.module
index d1e714e..a9f5c9c 100644
--- a/blockgroup.module
+++ b/blockgroup.module
@@ -479,6 +479,7 @@ function blockgroup_region_list() {
   $regions = &drupal_static(__FUNCTION__);
 
   if (!isset($regions)) {
+    $regions = array();
     foreach (blockgroup_list() as $delta => $title) {
       $regions[blockgroup_get_region($delta)] = t('Block group: @title', array('@title' => $title));
     }