diff --git a/apps/files_sharing/lib/sharedstorage.php b/apps/files_sharing/lib/sharedstorage.php
index ad695836396739c18fd31693171f87a57b33f9a1..bf61dda37187e7b613038e772c009e5ff16675ba 100644
--- a/apps/files_sharing/lib/sharedstorage.php
+++ b/apps/files_sharing/lib/sharedstorage.php
@@ -634,4 +634,15 @@ class Shared extends \OC\Files\Storage\Common implements ISharedStorage {
 		list($targetStorage, $targetInternalPath) = $this->resolvePath($path);
 		$targetStorage->releaseLock($targetInternalPath, $type, $provider);
 	}
+
+	/**
+	 * @param string $path
+	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+	 * @param \OCP\Lock\ILockingProvider $provider
+	 */
+	public function changeLock($path, $type, ILockingProvider $provider) {
+		/** @var \OCP\Files\Storage $targetStorage */
+		list($targetStorage, $targetInternalPath) = $this->resolvePath($path);
+		$targetStorage->changeLock($targetInternalPath, $type, $provider);
+	}
 }
diff --git a/lib/private/files/storage/common.php b/lib/private/files/storage/common.php
index f0c9e1bfa050a7adc004d7795198e67451193259..847cb8492fef7305611a2b0dd927fc2f08f6508e 100644
--- a/lib/private/files/storage/common.php
+++ b/lib/private/files/storage/common.php
@@ -641,4 +641,13 @@ abstract class Common implements Storage {
 	public function releaseLock($path, $type, ILockingProvider $provider) {
 		$provider->releaseLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
 	}
+
+	/**
+	 * @param string $path
+	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+	 * @param \OCP\Lock\ILockingProvider $provider
+	 */
+	public function changeLock($path, $type, ILockingProvider $provider) {
+		$provider->changeLock('files/' . md5($this->getId() . '::' . trim($path, '/')), $type);
+	}
 }
diff --git a/lib/private/files/storage/storage.php b/lib/private/files/storage/storage.php
index 642544bad37dd608ce5d0b6643985c5bb27a23c4..bd809099e1f90c3059b4e2c012bc02d41d3596f4 100644
--- a/lib/private/files/storage/storage.php
+++ b/lib/private/files/storage/storage.php
@@ -91,4 +91,12 @@ interface Storage extends \OCP\Files\Storage {
 	 * @param \OCP\Lock\ILockingProvider $provider
 	 */
 	public function releaseLock($path, $type, ILockingProvider $provider);
+
+	/**
+	 * @param string $path The path of the file to change the lock for
+	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+	 * @param \OCP\Lock\ILockingProvider $provider
+	 * @throws \OCP\Lock\LockedException
+	 */
+	public function changeLock($path, $type, ILockingProvider $provider);
 }
diff --git a/lib/private/files/storage/wrapper/jail.php b/lib/private/files/storage/wrapper/jail.php
index 229d12e82fa5be99136b09fff809897053ace3ac..2857e74de4648cc21170c501f147459445a01f7d 100644
--- a/lib/private/files/storage/wrapper/jail.php
+++ b/lib/private/files/storage/wrapper/jail.php
@@ -444,4 +444,13 @@ class Jail extends Wrapper {
 	public function releaseLock($path, $type, ILockingProvider $provider) {
 		$this->storage->releaseLock($this->getSourcePath($path), $type, $provider);
 	}
+
+	/**
+	 * @param string $path
+	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+	 * @param \OCP\Lock\ILockingProvider $provider
+	 */
+	public function changeLock($path, $type, ILockingProvider $provider) {
+		$this->storage->changeLock($this->getSourcePath($path), $type, $provider);
+	}
 }
diff --git a/lib/private/files/storage/wrapper/wrapper.php b/lib/private/files/storage/wrapper/wrapper.php
index 6aca771c0bf931e3f3965f4f30dcf15aefbb751c..d1414880beb090c1143b5742c3dd97c39311ad16 100644
--- a/lib/private/files/storage/wrapper/wrapper.php
+++ b/lib/private/files/storage/wrapper/wrapper.php
@@ -561,4 +561,13 @@ class Wrapper implements \OC\Files\Storage\Storage {
 	public function releaseLock($path, $type, ILockingProvider $provider) {
 		$this->storage->releaseLock($path, $type, $provider);
 	}
+
+	/**
+	 * @param string $path
+	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+	 * @param \OCP\Lock\ILockingProvider $provider
+	 */
+	public function changeLock($path, $type, ILockingProvider $provider) {
+		$this->storage->changeLock($path, $type, $provider);
+	}
 }
diff --git a/lib/public/files/storage.php b/lib/public/files/storage.php
index 68d00fab34cce9fc842d535e4eb932f5dd06dd3e..ee160c50e89e9dd586b35f95b81ab5ce8e230c33 100644
--- a/lib/public/files/storage.php
+++ b/lib/public/files/storage.php
@@ -429,4 +429,12 @@ interface Storage {
 	 * @param \OCP\Lock\ILockingProvider $provider
 	 */
 	public function releaseLock($path, $type, ILockingProvider $provider);
+
+	/**
+	 * @param string $path The path of the file to change the lock for
+	 * @param int $type \OCP\Lock\ILockingProvider::LOCK_SHARED or \OCP\Lock\ILockingProvider::LOCK_EXCLUSIVE
+	 * @param \OCP\Lock\ILockingProvider $provider
+	 * @throws \OCP\Lock\LockedException
+	 */
+	public function changeLock($path, $type, ILockingProvider $provider);
 }