diff --git a/src/JS.php b/src/JS.php
index 83ba16a..d553c09 100644
--- a/src/JS.php
+++ b/src/JS.php
@@ -120,9 +120,13 @@ class JS extends Minify
     protected $operatorsAfter = array();
 
     /**
+     * Public property so it can be accessed from inside the closure in
+     * extractRegex. Once PHP5.3 compatibility is dropped, we can make this
+     * property protected again.
+     *
      * @var array
      */
-    protected $nestedExtracted = array();
+    public $nestedExtracted = array();
 
     /**
      * {@inheritdoc}