diff --git a/server/src/Action/AttributeDistinctAction.php b/server/src/Action/AttributeDistinctAction.php
index 9564ecfd0ec05a16f8235086ff4adfc3c5f16b40..82c23c32b7cc3c733c3b855a24e8af14a7fbe289 100644
--- a/server/src/Action/AttributeDistinctAction.php
+++ b/server/src/Action/AttributeDistinctAction.php
@@ -83,7 +83,7 @@ final class AttributeDistinctAction extends AbstractAction
 
             // Execute query and returns response
             $stmt = $queryBuilder->execute();
-            $rows = $stmt->fetchAll(PDO::FETCH_COLUMN, 0);
+            $rows = $stmt->fetchAll(PDO::FETCH_COLUMN);
             $payload = json_encode($rows);
         }