diff --git a/lib/cache.php b/lib/cache.php
index 8f5987ce27..59110f74d8 100644
--- a/lib/cache.php
+++ b/lib/cache.php
@@ -53,7 +53,7 @@ class Cache
 
     const COMPRESSED = 1;
 
-    private function __constructor() {
+    private function __construct() {
         // Potentially long-running daemons or maintenance scripts
         // should not use an in-process cache as it becomes out of
         // date.