diff --git a/core/lib/Drupal/Core/Cache/CacheCollectorInterface.php b/core/lib/Drupal/Core/Cache/CacheCollectorInterface.php
index ee67c41..be9385f 100644
--- a/core/lib/Drupal/Core/Cache/CacheCollectorInterface.php
+++ b/core/lib/Drupal/Core/Cache/CacheCollectorInterface.php
@@ -30,7 +30,8 @@
    * @return mixed
    *   The corresponding cache data.
    */
-  public function get($key);
+  // @todo: This results in a fatal error in PHP <5.3.10.
+  //public function get($key);
 
   /**
    * Sets cache data.