diff --git a/lib/models/Vote.php b/lib/models/Vote.php
index 645e5a497ae3469c45276a519b4327e0a74a2ae6..a86e4c4b4eeb8de0a7a60a61a1d974891cf1c640 100644
--- a/lib/models/Vote.php
+++ b/lib/models/Vote.php
@@ -151,7 +151,9 @@ class Vote extends QuestionnaireQuestion implements QuestionType
                 } else {
                     $userId = _('unbekannt') . ' ' . ++$countNobodys;
                 }
-                $answerOption[$userId] = $options[$answerData['answers']];
+                if (!empty($options[$answerData['answers']])) {
+                    $answerOption[$userId] = $options[$answerData['answers']];
+                }
             }
 
             $question = strip_tags($this['questiondata']['description']);