diff --git a/change_log.txt b/change_log.txt
index 6308219a..a16452f6 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -1,4 +1,7 @@
 ===== trunk  =====
+16.10.2011
+- bugfix testInstall() did not propery check cache_dir and compile_dir
+
 15.10.2011
 - bugfix Smarty_Resource and Smarty_CacheResource runtime caching (Forum Post 75264)
 
diff --git a/libs/sysplugins/smarty_internal_utility.php b/libs/sysplugins/smarty_internal_utility.php
index 01d2c5c5..2c184cd3 100644
--- a/libs/sysplugins/smarty_internal_utility.php
+++ b/libs/sysplugins/smarty_internal_utility.php
@@ -359,7 +359,7 @@ class Smarty_Internal_Utility {
         // test if registered compile_dir is accessible
         $__compile_dir = $smarty->getCompileDir();
         $_compile_dir = realpath($__compile_dir);
-        if (!$__compile_dir) {
+        if (!$_compile_dir) {
             $status = false;
             $message = "FAILED: {$__compile_dir} does not exist";
             if ($errors === null) {
@@ -488,7 +488,7 @@ class Smarty_Internal_Utility {
         // test if all registered cache_dir is accessible
         $__cache_dir = $smarty->getCacheDir();
         $_cache_dir = realpath($__cache_dir);
-        if (!$__cache_dir) {
+        if (!$_cache_dir) {
             $status = false;
             $message = "FAILED: {$__cache_dir} does not exist";
             if ($errors === null) {