diff --git a/src/ConditionalFieldsFormHelper.php b/src/ConditionalFieldsFormHelper.php
index 2a7d082ffc416a4dbab7a73b7d80e70ab9eb6e75..33300b9e687744678839c37f9f617a9cba60a6f1 100644
--- a/src/ConditionalFieldsFormHelper.php
+++ b/src/ConditionalFieldsFormHelper.php
@@ -933,7 +933,9 @@ class ConditionalFieldsFormHelper {
       }
 
       if ($options['condition'] === 'empty') {
-        $values = (isset($values[0]['value'])) ? $values[0]['value'] : $values;
+        if (is_array($values)) {
+          $values = (isset($values[0]['value'])) ? $values[0]['value'] : $values;
+        }
         $values = ($values === '_none') ? '' : $values;
         return (empty($values)) ? TRUE : FALSE;
       }