diff --git a/src/Core/Lock/Lock.php b/src/Core/BaseLock.php
similarity index 82%
rename from src/Core/Lock/Lock.php
rename to src/Core/BaseLock.php
index a124340c75..2fcf7cad70 100644
--- a/src/Core/Lock/Lock.php
+++ b/src/Core/BaseLock.php
@@ -1,21 +1,14 @@
 <?php
 
-namespace Friendica\Core\Lock;
+namespace Friendica\Core;
 
-use Friendica\Core\Cache\Type;
+use Friendica\Core\Lock\ILock;
 
 /**
- * Class AbstractLock
- *
- * @package Friendica\Core\Lock
- *
  * Basic class for Locking with common functions (local acquired locks, releaseAll, ..)
  */
-abstract class Lock implements ILock
+abstract class BaseLock implements ILock
 {
-	const TYPE_DATABASE  = Type::DATABASE;
-	const TYPE_SEMAPHORE = 'semaphore';
-
 	/**
 	 * @var array The local acquired locks
 	 */
diff --git a/src/Core/Lock/CacheLock.php b/src/Core/Lock/CacheLock.php
index 3fec76562c..fd04bda80f 100644
--- a/src/Core/Lock/CacheLock.php
+++ b/src/Core/Lock/CacheLock.php
@@ -2,10 +2,11 @@
 
 namespace Friendica\Core\Lock;
 
-use Friendica\Core\Cache;
+use Friendica\Core\BaseLock;
+use Friendica\Core\Cache\Duration;
 use Friendica\Core\Cache\IMemoryCache;
 
-class CacheLock extends Lock
+class CacheLock extends BaseLock
 {
 	/**
 	 * @var string The static prefix of all locks inside the cache
@@ -30,7 +31,7 @@ class CacheLock extends Lock
 	/**
 	 * (@inheritdoc)
 	 */
-	public function acquire($key, $timeout = 120, $ttl = Cache\Duration::FIVE_MINUTES)
+	public function acquire($key, $timeout = 120, $ttl = Duration::FIVE_MINUTES)
 	{
 		$got_lock = false;
 		$start    = time();
diff --git a/src/Core/Lock/DatabaseLock.php b/src/Core/Lock/DatabaseLock.php
index ca72db56b2..df1b9295c9 100644
--- a/src/Core/Lock/DatabaseLock.php
+++ b/src/Core/Lock/DatabaseLock.php
@@ -2,6 +2,7 @@
 
 namespace Friendica\Core\Lock;
 
+use Friendica\Core\BaseLock;
 use Friendica\Core\Cache\Duration;
 use Friendica\Database\Database;
 use Friendica\Util\DateTimeFormat;
@@ -9,7 +10,7 @@ use Friendica\Util\DateTimeFormat;
 /**
  * Locking driver that stores the locks in the database
  */
-class DatabaseLock extends Lock
+class DatabaseLock extends BaseLock
 {
 	/**
 	 * The current ID of the process
@@ -131,7 +132,7 @@ class DatabaseLock extends Lock
 	 */
 	public function getName()
 	{
-		return self::TYPE_DATABASE;
+		return Type::DATABASE;
 	}
 
 	/**
diff --git a/src/Core/Lock/ILock.php b/src/Core/Lock/ILock.php
index 0d3fe55fd2..a1a3f13e7f 100644
--- a/src/Core/Lock/ILock.php
+++ b/src/Core/Lock/ILock.php
@@ -2,7 +2,7 @@
 
 namespace Friendica\Core\Lock;
 
-use Friendica\Core\Cache;
+use Friendica\Core\Cache\Duration;
 
 /**
  * Lock Interface
@@ -30,7 +30,7 @@ interface ILock
 	 *
 	 * @return boolean Was the lock successful?
 	 */
-	public function acquire($key, $timeout = 120, $ttl = Cache\Duration::FIVE_MINUTES);
+	public function acquire($key, $timeout = 120, $ttl = Duration::FIVE_MINUTES);
 
 	/**
 	 * Releases a lock if it was set by us
diff --git a/src/Core/Lock/SemaphoreLock.php b/src/Core/Lock/SemaphoreLock.php
index 297adad31e..86f106d56d 100644
--- a/src/Core/Lock/SemaphoreLock.php
+++ b/src/Core/Lock/SemaphoreLock.php
@@ -2,9 +2,10 @@
 
 namespace Friendica\Core\Lock;
 
-use Friendica\Core\Cache;
+use Friendica\Core\BaseLock;
+use Friendica\Core\Cache\Duration;
 
-class SemaphoreLock extends Lock
+class SemaphoreLock extends BaseLock
 {
 	private static $semaphore = [];
 
@@ -36,7 +37,7 @@ class SemaphoreLock extends Lock
 	/**
 	 * (@inheritdoc)
 	 */
-	public function acquire($key, $timeout = 120, $ttl = Cache\Duration::FIVE_MINUTES)
+	public function acquire($key, $timeout = 120, $ttl = Duration::FIVE_MINUTES)
 	{
 		self::$semaphore[$key] = sem_get(self::semaphoreKey($key));
 		if (!empty(self::$semaphore[$key])) {
@@ -85,7 +86,7 @@ class SemaphoreLock extends Lock
 	 */
 	public function getName()
 	{
-		return self::TYPE_SEMAPHORE;
+		return Type::SEMAPHORE;
 	}
 
 	/**
diff --git a/src/Core/Lock/Type.php b/src/Core/Lock/Type.php
new file mode 100644
index 0000000000..fdee39cabe
--- /dev/null
+++ b/src/Core/Lock/Type.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace Friendica\Core\Lock;
+
+use Friendica\Core\Cache\Type as CacheType;
+
+/**
+ * Enumeration for lock types
+ *
+ * There's no "Cache" lock type, because the type depends on the concrete, used cache
+ */
+abstract class Type
+{
+	const DATABASE  = CacheType::DATABASE;
+	const SEMAPHORE = 'semaphore';
+}