diff --git a/lib/models/Vote.php b/lib/models/Vote.php
index 21b3359c21109d8c22d8c5d41b60ef5417ae171a..9a295a6647d92080ecdc9f5b17e67c00de117d80 100644
--- a/lib/models/Vote.php
+++ b/lib/models/Vote.php
@@ -62,7 +62,7 @@ class Vote extends QuestionnaireQuestion implements QuestionType
         $answer = $this->getMyAnswer();
 
         $answers = Request::getArray('answers');
-        $userAnswer = 0;
+        $userAnswer = null;
         if (array_key_exists($this->getId(), $answers)) {
             $userAnswer = $answers[$this->getId()]['answerdata']['answers'];
             if (is_array($userAnswer)) {