diff --git a/lib/cache.php b/lib/cache.php
index 253839fb17..bac3499e5e 100644
--- a/lib/cache.php
+++ b/lib/cache.php
@@ -116,7 +116,7 @@ class Cache
 
     function get($key)
     {
-        $value = null;
+        $value = false;
 
         if (Event::handle('StartCacheGet', array(&$key, &$value))) {
             if (array_key_exists($key, $this->_items)) {