diff --git a/src/_h5ai/private/php/ext/class-thumb.php b/src/_h5ai/private/php/ext/class-thumb.php
index d52d3e85e..03b3df1ec 100644
--- a/src/_h5ai/private/php/ext/class-thumb.php
+++ b/src/_h5ai/private/php/ext/class-thumb.php
@@ -29,8 +29,12 @@ public function thumb($type, $source_href, $width, $height) {
             return null;
         }
 
-        $capture_path = $source_path;
-        if ($type === 'img') {
+        $capture_path = false;
+        $fileparts = pathinfo($source_path);
+        $custom_path = $fileparts['dirname'].'/.thumb/'.$fileparts['filename'].'.jpg';
+        if (file_exists($custom_path)) {
+            $capture_path = $custom_path;
+        } elseif ($type === 'img') {
             $capture_path = $source_path;
         } elseif ($type === 'mov') {
             if ($this->setup->get('HAS_CMD_AVCONV')) {
@@ -46,7 +50,7 @@ public function thumb($type, $source_href, $width, $height) {
             }
         }
 
-        return $this->thumb_href($capture_path, $width, $height);
+        return $capture_path ? $this->thumb_href($capture_path, $width, $height) : null;
     }
 
     private function thumb_href($source_path, $width, $height) {
diff --git a/src/_h5ai/public/js/lib/ext/thumbnails.js b/src/_h5ai/public/js/lib/ext/thumbnails.js
index d71898cc2..1c7d2c558 100644
--- a/src/_h5ai/public/js/lib/ext/thumbnails.js
+++ b/src/_h5ai/public/js/lib/ext/thumbnails.js
@@ -25,8 +25,6 @@ const queueItem = (queue, item) => {
         type = 'mov';
     } else if (includes(settings.doc, item.type)) {
         type = 'doc';
-    } else {
-        return;
     }
 
     if (item.thumbSquare) {