diff --git a/lib/private/memcache/redis.php b/lib/private/memcache/redis.php
index 83be662eab..68b62e7534 100644
--- a/lib/private/memcache/redis.php
+++ b/lib/private/memcache/redis.php
@@ -25,9 +25,9 @@
 
 namespace OC\Memcache;
 
-use OCP\IMemcache;
+use OCP\IMemcacheTTL;
 
-class Redis extends Cache implements IMemcache {
+class Redis extends Cache implements IMemcacheTTL {
 	/**
 	 * @var \Redis $cache
 	 */
@@ -195,6 +195,10 @@ class Redis extends Cache implements IMemcache {
 		return false;
 	}
 
+	public function setTTL($key, $ttl) {
+		self::$cache->expire($this->getNamespace() . $key, $ttl);
+	}
+
 	static public function isAvailable() {
 		return extension_loaded('redis')
 		&& version_compare(phpversion('redis'), '2.2.5', '>=');
diff --git a/lib/public/imemcachettl.php b/lib/public/imemcachettl.php
new file mode 100644
index 0000000000..aae26accb4
--- /dev/null
+++ b/lib/public/imemcachettl.php
@@ -0,0 +1,37 @@
+<?php
+/**
+ * @author Robin Appelman <icewind@owncloud.com>
+ *
+ * @copyright Copyright (c) 2015, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCP;
+
+/**
+ * Interface for memcache backends that support setting ttl after the value is set
+ *
+ * @since 9.0.0
+ */
+interface IMemcacheTTL extends IMemcache {
+	/**
+	 * Set the ttl for an existing value
+	 *
+	 * @param string $key
+	 * @param int $ttl time to live in seconds
+	 */
+	public function setTTL($key, $ttl);
+}