diff --git a/backend/src/Entity/Api/StationQuota.php b/backend/src/Entity/Api/StationQuota.php
index 32fb5d8cf3..b3251e53f3 100644
--- a/backend/src/Entity/Api/StationQuota.php
+++ b/backend/src/Entity/Api/StationQuota.php
@@ -38,13 +38,12 @@ final class StationQuota
     public bool $is_full;
 
     #[OA\Property]
-    public int $num_files;
+    public ?int $num_files = null;
 
     public static function fromStorageLocation(
         StorageLocation $storageLocation,
-        int $numFiles = 0
+        int|null $numFiles = null
     ): self {
-
         $record = new self();
         $record->used = $storageLocation->getStorageUsed();
         $record->used_bytes = (string)$storageLocation->getStorageUsedBytes();
diff --git a/frontend/entities/ApiInterfaces.ts b/frontend/entities/ApiInterfaces.ts
index 4633aa09cf..96e0af392d 100644
--- a/frontend/entities/ApiInterfaces.ts
+++ b/frontend/entities/ApiInterfaces.ts
@@ -818,7 +818,7 @@ export interface ApiStationQuota {
   quota?: string | null;
   quota_bytes?: string | null;
   is_full?: boolean;
-  num_files?: number;
+  num_files?: number | null;
 }
 
 export type ApiStationRemote = HasLinks & {