diff --git a/change_log.txt b/change_log.txt
index e32f7d8e..8029c361 100644
--- a/change_log.txt
+++ b/change_log.txt
@@ -1,5 +1,8 @@
  ===== 3.1.22-dev ===== (xx.xx.2015)
  
+ 20.01.2015
+ - bugfix clearCompiledTemplates() could try to delete whole drive at wrong path permissions because realpath() fail (forum 25397)
+ 
  04.01.2015
  - push last weeks changes to github
 
diff --git a/libs/sysplugins/smarty_internal_utility.php b/libs/sysplugins/smarty_internal_utility.php
index d5aa346d..af02b095 100644
--- a/libs/sysplugins/smarty_internal_utility.php
+++ b/libs/sysplugins/smarty_internal_utility.php
@@ -191,7 +191,10 @@ class Smarty_Internal_Utility
      */
     public static function clearCompiledTemplate($resource_name, $compile_id, $exp_time, Smarty $smarty)
     {
-        $_compile_dir = realpath($smarty->getCompileDir()) . '/';
+        if (($_compile_dir = realpath($smarty->getCompileDir())) === false) {
+            return 0;
+        }
+        $_compile_dir .= '/';
         $_compile_id = isset($compile_id) ? preg_replace('![^\w\|]+!', '_', $compile_id) : null;
         $_dir_sep = $smarty->use_sub_dirs ? '/' : '^';
         if (isset($resource_name)) {