diff --git a/system/codeigniter/CodeIgniter.php b/system/codeigniter/CodeIgniter.php
index 54f37c9..00032fa 100644
--- a/system/codeigniter/CodeIgniter.php
+++ b/system/codeigniter/CodeIgniter.php
@@ -186,6 +186,8 @@
 
 $CI = new $class($assign_to_controller);
 
+unset($assign_to_controller);
+
 // Is this a scaffolding request?
 if ($RTR->scaffolding_request === TRUE)
 {