diff --git a/be/app/Http/Resources/SubTaskResource.php b/be/app/Http/Resources/SubTaskResource.php
index 3ba2bc1..c6ce5f5 100644
--- a/be/app/Http/Resources/SubTaskResource.php
+++ b/be/app/Http/Resources/SubTaskResource.php
@@ -32,7 +32,7 @@ class SubTaskResource extends JsonResource
             'is_finished' => $this->is_finished,
             'timeblocks' => TimeblockResource::collection($this->timeblocks),
             'timesheets' => TimesheetResource::collection($this->timesheets),
-            'files' => AttachmentResource::collection($this->attachments->isNotEmpty() ?: $this->mastertask->attachments),
+            'files' => AttachmentResource::collection($this->attachments->isNotEmpty() ? $this->attachments : $this->mastertask->attachments),
             'color' => $this->mastertask->color,
         ];