diff --git a/lib/private/Files/Config/MountProviderCollection.php b/lib/private/Files/Config/MountProviderCollection.php
index 2b57ffe6e4c0d..3900e9870bdf5 100644
--- a/lib/private/Files/Config/MountProviderCollection.php
+++ b/lib/private/Files/Config/MountProviderCollection.php
@@ -207,6 +207,12 @@ public function registerRootProvider(IRootMountProvider $provider) {
 		$this->rootProviders[] = $provider;
 	}
 
+	/**
+	 * Get all root mountpoints
+	 *
+	 * @return \OCP\Files\Mount\IMountPoint[]
+	 * @since 20.0.0
+	 */
 	public function getRootMounts(): array {
 		$loader = $this->loader;
 		$mounts = array_map(function (IRootMountProvider $provider) use ($loader) {
diff --git a/lib/private/legacy/OC_Util.php b/lib/private/legacy/OC_Util.php
index fd55962447e23..2dc5b61e7afd6 100644
--- a/lib/private/legacy/OC_Util.php
+++ b/lib/private/legacy/OC_Util.php
@@ -299,7 +299,6 @@ public static function setupFS($user = '') {
 
 		/** @var \OCP\Files\Config\IMountProviderCollection $mountProviderCollection */
 		$mountProviderCollection = \OC::$server->query(\OCP\Files\Config\IMountProviderCollection::class);
-		/** @var \OCP\Files\Mount\IMountPoint[] $rootMountProviders */
 		$rootMountProviders = $mountProviderCollection->getRootMounts();
 
 		/** @var \OC\Files\Mount\Manager $mountManager */
diff --git a/lib/public/Files/Config/IMountProviderCollection.php b/lib/public/Files/Config/IMountProviderCollection.php
index 89b333b3e8532..a4131514662e9 100644
--- a/lib/public/Files/Config/IMountProviderCollection.php
+++ b/lib/public/Files/Config/IMountProviderCollection.php
@@ -79,4 +79,12 @@ public function registerHomeProvider(IHomeMountProvider $provider);
 	 * @since 9.0.0
 	 */
 	public function getMountCache();
+
+	/**
+	 * Get all root mountpoints
+	 *
+	 * @return \OCP\Files\Mount\IMountPoint[]
+	 * @since 20.0.0
+	 */
+	public function getRootMounts(): array;
 }
diff --git a/lib/public/Files/Config/IRootMountProvider.php b/lib/public/Files/Config/IRootMountProvider.php
index 0f7b0eca3d4b1..745fa530bedd7 100644
--- a/lib/public/Files/Config/IRootMountProvider.php
+++ b/lib/public/Files/Config/IRootMountProvider.php
@@ -32,7 +32,7 @@
  */
 interface IRootMountProvider {
 	/**
-	 * Get all root mountpoints
+	 * Get all root mountpoints of this provider
 	 *
 	 * @return \OCP\Files\Mount\IMountPoint[]
 	 * @since 20.0.0