diff --git a/classes/admincontroller.php b/classes/admincontroller.php
index 78523c17..2e2da8f2 100644
--- a/classes/admincontroller.php
+++ b/classes/admincontroller.php
@@ -1524,7 +1524,7 @@ class AdminController extends AdminBaseController
 
         foreach ($media->all() as $name => $medium) {
 
-            $metadata = null;
+            $metadata = [];
 
            if ($include_metadata) {
                 $img_metadata = $medium->metadata();