diff --git a/src/Bundle/ChillPersonBundle/Export/Aggregator/PersonAggregators/GenderAggregator.php b/src/Bundle/ChillPersonBundle/Export/Aggregator/PersonAggregators/GenderAggregator.php
index 0b94cbd4f..3cfadc355 100644
--- a/src/Bundle/ChillPersonBundle/Export/Aggregator/PersonAggregators/GenderAggregator.php
+++ b/src/Bundle/ChillPersonBundle/Export/Aggregator/PersonAggregators/GenderAggregator.php
@@ -62,6 +62,9 @@ final class GenderAggregator implements AggregatorInterface
                 case Person::BOTH_GENDER:
                     return $this->translator->trans('both');
 
+                case Person::NO_INFORMATION:
+                    return $this->translator->trans('unknown');
+
                 case null:
                     return $this->translator->trans('Not given');