diff --git a/change_log.txt b/change_log.txt
index 17fa9a7e..1bf0eeed 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -1,4 +1,7 @@
 ===== trunk  =====
+30.01.2012
+- bugfix Smarty_Security internal $_resource_dir cache wasn't properly propagated
+
 27.01.2012
 - bugfix Smarty did not a template name of "0" (Forum Topic 20895)
 
diff --git a/libs/sysplugins/smarty_security.php b/libs/sysplugins/smarty_security.php
index 90b0e3e2..f8b31d96 100644
--- a/libs/sysplugins/smarty_security.php
+++ b/libs/sysplugins/smarty_security.php
@@ -362,7 +362,7 @@ class Smarty_Security {
         $_directory = array();
         while (true) {
             // remember the directory to add it to _resource_dir in case we're successful
-            $_directory[] = $directory;
+            $_directory[$directory] = true;
             // test if the directory is trusted
             if (isset($this->_resource_dir[$directory])) {
                 // merge sub directories of current $directory into _resource_dir to speed up subsequent lookups