diff --git a/Lib/Formatter/Html.php b/Lib/Formatter/Html.php
index 1cf1caf..9d27240 100644
--- a/Lib/Formatter/Html.php
+++ b/Lib/Formatter/Html.php
@@ -41,6 +41,7 @@ class Html extends Formatter {
         // so take the first element of the 'result' array
         $func = key($data['result']);
         $data = reset($data['result']);
+        $data = is_array($data) ? $data : array();
         $title = $func;
 
         $content = '';