diff --git a/lib/Service/TagService.php b/lib/Service/TagService.php
index cbe2ba6c..e6c0cade 100644
--- a/lib/Service/TagService.php
+++ b/lib/Service/TagService.php
@@ -5,9 +5,12 @@ declare(strict_types=1);
 namespace OCA\Notes\Service;
 
 use OCP\ITagManager;
+use OCP\ITags;
 
 class TagService {
+	/** @var ITags */
 	private $tagger;
+	/** @var array */
 	private $cachedTags;
 
 	public function __construct(ITagManager $tagManager) {
@@ -18,28 +21,12 @@ class TagService {
 		$this->cachedTags = $this->tagger->getTagsForObjects($fileIds);
 	}
 
-	// TODO NC19: replace this by OCP\ITags::TAG_FAVORITE
-	// OCP\ITags::TAG_FAVORITE was introduced in NC19
-	// https://github.com/nextcloud/server/pull/19412
-	/**
-	 * @suppress PhanUndeclaredClassConstant
-	 * @suppress PhanUndeclaredConstant
-	 * @suppress PhanUndeclaredConstantOfClass
-	 */
-	private static function getTagFavorite() {
-		if (defined('OCP\ITags::TAG_FAVORITE')) {
-			return \OCP\ITags::TAG_FAVORITE;
-		} else {
-			return \OC\Tags::TAG_FAVORITE;
-		}
-	}
-
 	public function isFavorite($fileId) : bool {
 		$alltags = $this->cachedTags;
 		if (!is_array($alltags)) {
 			$alltags = $this->tagger->getTagsForObjects([$fileId]);
 		}
-		return array_key_exists($fileId, $alltags) && in_array(self::getTagFavorite(), $alltags[$fileId]);
+		return array_key_exists($fileId, $alltags) && in_array(ITags::TAG_FAVORITE, $alltags[$fileId]);
 	}
 
 	public function setFavorite($fileId, $favorite) : void {