1 files changed, 1 insertions, 1 deletions
diff --git a/app/Module/FamilyTreeStatisticsModule.php b/app/Module/FamilyTreeStatisticsModule.php
index 6e0a12ad7d..06cf6f545e 100644
--- a/app/Module/FamilyTreeStatisticsModule.php
+++ b/app/Module/FamilyTreeStatisticsModule.php
@@ -347,7 +347,7 @@ class FamilyTreeStatisticsModule extends AbstractModule implements ModuleBlockIn
      *
      * @return Expression
      */
-    private function binaryColumn(string $column, string $alias = null): Expression
+    private function binaryColumn(string $column, string|null $alias = null): Expression
     {
         if (DB::connection()->getDriverName() === 'mysql') {
             $sql = 'CAST(' . $column . ' AS binary)';