diff --git a/tagadelic.module b/tagadelic.module
index ffa48ea..5c6c53a 100644
--- a/tagadelic.module
+++ b/tagadelic.module
@@ -163,6 +163,12 @@ function tagadelic_page_chunk($vocs) {
     }
   }
 
+  // If no vocabulary is founded in the site return with an empty string instead
+  // of drupal not found.
+  if (!is_array($vocs)) {
+    return '';
+  }
+
   $tags = tagadelic_get_weighted_tags($vocs, variable_get('tagadelic_levels', 6), variable_get('tagadelic_page_amount', '60'));
   $tags = tagadelic_sort_tags($tags);
   $output = theme('tagadelic_weighted', $tags);