diff --git a/lib/Controller/PlacesController.php b/lib/Controller/PlacesController.php
index 8dd1b5d2..4d93c89b 100644
--- a/lib/Controller/PlacesController.php
+++ b/lib/Controller/PlacesController.php
@@ -90,8 +90,8 @@ class PlacesController extends ApiBase
         shuffle($list);
 
         // Get preview from image list
-        return $this->getPreviewFromImageList(array_map(static function ($item) {
-            return $item['fileid'];
+        return $this->getPreviewFromImageList(array_map(static function (&$item) {
+            return (int) $item['fileid'];
         }, $list));
     }
 }
diff --git a/lib/Controller/TagsController.php b/lib/Controller/TagsController.php
index 54ac632a..8e369492 100644
--- a/lib/Controller/TagsController.php
+++ b/lib/Controller/TagsController.php
@@ -92,8 +92,8 @@ class TagsController extends ApiBase
         shuffle($list);
 
         // Get preview from image list
-        return $this->getPreviewFromImageList(array_map(static function ($item) {
-            return $item['fileid'];
+        return $this->getPreviewFromImageList(array_map(static function (&$item) {
+            return (int) $item['fileid'];
         }, $list));
     }
 }