diff --git a/core/includes/cache.inc b/core/includes/cache.inc
index 48dbdd34e45..a90f54733dd 100644
--- a/core/includes/cache.inc
+++ b/core/includes/cache.inc
@@ -18,10 +18,10 @@
  *   The cache bin for which the cache object should be returned, defaults to
  *   'cache'.
  *
- * @return Drupal\Cache\CacheBackendInterface
+ * @return Drupal\Core\Cache\CacheBackendInterface
  *   The cache object associated with the specified bin.
  *
- * @see Drupal\Cache\CacheBackendInterface
+ * @see Drupal\Core\Cache\CacheBackendInterface
  */
 function cache($bin = 'cache') {
   // Temporary backwards compatibiltiy layer, allow old style prefixed cache
@@ -34,7 +34,7 @@ function cache($bin = 'cache') {
   if (!isset($cache_objects[$bin])) {
     $class = variable_get('cache_class_' . $bin);
     if (!isset($class)) {
-      $class = variable_get('cache_default_class', 'Drupal\Cache\DatabaseBackend');
+      $class = variable_get('cache_default_class', 'Drupal\Core\Cache\DatabaseBackend');
     }
     $cache_objects[$bin] = new $class($bin);
   }
diff --git a/core/lib/Drupal/Cache/CacheBackendInterface.php b/core/lib/Drupal/Core/Cache/CacheBackendInterface.php
similarity index 99%
rename from core/lib/Drupal/Cache/CacheBackendInterface.php
rename to core/lib/Drupal/Core/Cache/CacheBackendInterface.php
index 3cb3c462c4d..6284047456b 100644
--- a/core/lib/Drupal/Cache/CacheBackendInterface.php
+++ b/core/lib/Drupal/Core/Cache/CacheBackendInterface.php
@@ -5,7 +5,7 @@
  * Definition of CacheBackendInterface.
  */
 
-namespace Drupal\Cache;
+namespace Drupal\Core\Cache;
 
 /**
  * Defines an interface for cache implementations.
diff --git a/core/lib/Drupal/Cache/DatabaseBackend.php b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
similarity index 99%
rename from core/lib/Drupal/Cache/DatabaseBackend.php
rename to core/lib/Drupal/Core/Cache/DatabaseBackend.php
index 5d9be1486bf..81522ca1e08 100644
--- a/core/lib/Drupal/Cache/DatabaseBackend.php
+++ b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
@@ -5,7 +5,7 @@
  * Definition of DatabaseBackend.
  */
 
-namespace Drupal\Cache;
+namespace Drupal\Core\Cache;
 
 use Exception;
 
diff --git a/core/lib/Drupal/Cache/InstallBackend.php b/core/lib/Drupal/Core/Cache/InstallBackend.php
similarity index 98%
rename from core/lib/Drupal/Cache/InstallBackend.php
rename to core/lib/Drupal/Core/Cache/InstallBackend.php
index f13ff989b06..91805aee810 100644
--- a/core/lib/Drupal/Cache/InstallBackend.php
+++ b/core/lib/Drupal/Core/Cache/InstallBackend.php
@@ -5,7 +5,7 @@
  * Definition of InstallBackend.
  */
 
-namespace Drupal\Cache;
+namespace Drupal\Core\Cache;
 
 use Exception;
 
diff --git a/core/lib/Drupal/Cache/NullBackend.php b/core/lib/Drupal/Core/Cache/NullBackend.php
similarity index 98%
rename from core/lib/Drupal/Cache/NullBackend.php
rename to core/lib/Drupal/Core/Cache/NullBackend.php
index 3ab731c9f63..c0e1ab42d3b 100644
--- a/core/lib/Drupal/Cache/NullBackend.php
+++ b/core/lib/Drupal/Core/Cache/NullBackend.php
@@ -5,7 +5,7 @@
  * Definition of NullBackend.
  */
 
-namespace Drupal\Cache;
+namespace Drupal\Core\Cache;
 
 /**
  * Defines a stub cache implementation.