diff --git a/config/config.sample.php b/config/config.sample.php
index a2a631832529..34d8dd931129 100644
--- a/config/config.sample.php
+++ b/config/config.sample.php
@@ -1056,7 +1056,9 @@
  *  - OC\Preview\WEBP
  *  - OC\Preview\GIF
  *  - OC\Preview\BMP
+ *  - OC\Preview\Heic
  *  - OC\Preview\XBitmap
+ *  - OC\Preview\SGI
  *  - OC\Preview\MarkDown
  *  - OC\Preview\MP3
  *  - OC\Preview\TXT
@@ -1064,18 +1066,17 @@
  * See the Previews Configuration documentation for more details.
  */
 'enabledPreviewProviders' => [
-	'OC\Preview\PDF',
-	'OC\Preview\SGI',
-	'OC\Preview\Heic',
 	'OC\Preview\PNG',
 	'OC\Preview\JPEG',
 	'OC\Preview\WEBP',
 	'OC\Preview\GIF',
 	'OC\Preview\BMP',
+	'OC\Preview\Heic',
 	'OC\Preview\XBitmap',
+	'OC\Preview\SGI',
+	'OC\Preview\MarkDown',
 	'OC\Preview\MP3',
-	'OC\Preview\TXT',
-	'OC\Preview\MarkDown'
+	'OC\Preview\TXT'
   ],
 
 /**
diff --git a/lib/private/PreviewManager.php b/lib/private/PreviewManager.php
index eab8c561ba90..d2e0bfbe7392 100644
--- a/lib/private/PreviewManager.php
+++ b/lib/private/PreviewManager.php
@@ -236,7 +236,9 @@ public function isAvailable(\OCP\Files\FileInfo $file) {
 	 *  - OC\Preview\WEBP
 	 *  - OC\Preview\GIF
 	 *  - OC\Preview\BMP
+	 *  - OC\Preview\Heic
 	 *  - OC\Preview\XBitmap
+	 *  - OC\Preview\SGI
 	 *  - OC\Preview\MarkDown
 	 *  - OC\Preview\MP3
 	 *  - OC\Preview\TXT