diff --git a/theme/views_slideshow.theme.inc b/theme/views_slideshow.theme.inc
index 7997a8f..1707988 100644
--- a/theme/views_slideshow.theme.inc
+++ b/theme/views_slideshow.theme.inc
@@ -129,8 +129,8 @@ function _views_slideshow_preprocess_views_slideshow(&$vars) {
 
     // Build weights
     for ($i = 1; $i <= count($widgets); $i++) {
-      $weight['top'][$i] = '';
-      $weight['bottom'][$i] = '';
+      $weight['top'][$i] = array();
+      $weight['bottom'][$i] = array();
     }
 
     foreach ($widgets as $widget_id => $widget_name) {