diff --git a/lib/private/Share20/DefaultShareProvider.php b/lib/private/Share20/DefaultShareProvider.php
index 2002e3bf8cbc6a815b3d14acbcaf0c68b7ad7b4f..60859c485c74b14a3c09cb0cf49783f012435735 100644
--- a/lib/private/Share20/DefaultShareProvider.php
+++ b/lib/private/Share20/DefaultShareProvider.php
@@ -24,6 +24,7 @@
 namespace OC\Share20;
 
 use OCP\Files\File;
+use OCP\Files\Folder;
 use OCP\Share\IShareProvider;
 use OC\Share20\Exception\InvalidShare;
 use OC\Share20\Exception\ProviderException;
@@ -454,7 +455,7 @@ class DefaultShareProvider implements IShareProvider {
 		return $share;
 	}
 
-	public function getSharesInFolder($userId, $node, $reshares) {
+	public function getSharesInFolder($userId, Folder $node, $reshares) {
 		$qb = $this->dbConn->getQueryBuilder();
 		$qb->select('*')
 			->from('share', 's')
diff --git a/lib/private/Share20/Manager.php b/lib/private/Share20/Manager.php
index f2f4acf8d00e0d9e400517688bfa71e70c54ff78..9468a1de306af4a486f08b75df4b094bc52d9117 100644
--- a/lib/private/Share20/Manager.php
+++ b/lib/private/Share20/Manager.php
@@ -883,7 +883,7 @@ class Manager implements IManager {
 		$provider->move($share, $recipientId);
 	}
 
-	public function getSharesInFolder($userId, Node $node, $reshares = false) {
+	public function getSharesInFolder($userId, Folder $node, $reshares = false) {
 		$providers = $this->factory->getAllProviders();
 
 		return array_reduce($providers, function($shares, IShareProvider $provider) use ($userId, $node, $reshares) {
diff --git a/lib/public/Share/IManager.php b/lib/public/Share/IManager.php
index e8c69e06f9fd327df7fc53aa927f36cdb60a2b3d..a74ab5fe7968306cb525c4ae9c96dc7be3083095 100644
--- a/lib/public/Share/IManager.php
+++ b/lib/public/Share/IManager.php
@@ -22,6 +22,7 @@
 
 namespace OCP\Share;
 
+use OCP\Files\Folder;
 use OCP\Files\Node;
 
 use OCP\Share\Exceptions\ShareNotFound;
@@ -91,12 +92,12 @@ interface IManager {
 	 * Get all shares shared by (initiated) by the provided user in a folder.
 	 *
 	 * @param string $userId
-	 * @param Node|null $node
+	 * @param Folder $node
 	 * @param bool $reshares
 	 * @return IShare[]
 	 * @since 9.2.0
 	 */
-	public function getSharesInFolder($userId, Node $node, $reshares = false);
+	public function getSharesInFolder($userId, Folder $node, $reshares = false);
 
 	/**
 	 * Get shares shared by (initiated) by the provided user.
diff --git a/lib/public/Share/IShareProvider.php b/lib/public/Share/IShareProvider.php
index db444d36935fa18233f424d1cc2bd99b707854b4..7d134583317adfd1b3147705795894e256024f2d 100644
--- a/lib/public/Share/IShareProvider.php
+++ b/lib/public/Share/IShareProvider.php
@@ -22,6 +22,7 @@
 
 namespace OCP\Share;
 
+use OCP\Files\Folder;
 use OCP\Share\Exceptions\ShareNotFound;
 use OCP\Files\Node;
 
@@ -95,12 +96,12 @@ interface IShareProvider {
 	 * Get all shares by the given user in a folder
 	 *
 	 * @param string $userId
-	 * @param Node|null $node
+	 * @param Folder $node
 	 * @param bool $reshares Also get the shares where $user is the owner instead of just the shares where $user is the initiator
 	 * @return \OCP\Share\IShare[]
 	 * @since 9.2.0
 	 */
-	public function getSharesInFolder($userId, $node, $reshares);
+	public function getSharesInFolder($userId, Folder $node, $reshares);
 
 	/**
 	 * Get all shares by the given user