diff --git a/app/Http/Controllers/Api/SpecialController.php b/app/Http/Controllers/Api/SpecialController.php
index 977735e..2cccf38 100644
--- a/app/Http/Controllers/Api/SpecialController.php
+++ b/app/Http/Controllers/Api/SpecialController.php
@@ -17,7 +17,9 @@ class SpecialController extends Controller
 		$detail = Special::query()
 			->select(['id', 'picture', 'updated_at', 'agent_product_id'])
 			->find($id);
-		$detail->picture = array_map(fn($v) => $prefix . $v, $detail->picture);
+		if ($detail->picture) {
+			$detail->picture = array_map(fn($v) => $prefix . $v, $detail->picture);
+		}
 
 		$detail->product = AgentProduct::list($this->agent_id)
 			->whereIn('id', $detail->agent_product_id)