diff --git a/libs/sysplugins/smarty_internal_cacheresource_file.php b/libs/sysplugins/smarty_internal_cacheresource_file.php
index 17c6e4bf..b8e99cc6 100644
--- a/libs/sysplugins/smarty_internal_cacheresource_file.php
+++ b/libs/sysplugins/smarty_internal_cacheresource_file.php
@@ -147,7 +147,10 @@ class Smarty_Internal_CacheResource_File extends Smarty_CacheResource
         $_compile_id = isset($compile_id) ? preg_replace('![^\w\|]+!', '_', $compile_id) : null;
         $_dir_sep = $smarty->use_sub_dirs ? '/' : '^';
         $_compile_id_offset = $smarty->use_sub_dirs ? 3 : 0;
-        $_dir = realpath($smarty->getCacheDir()) . '/';
+        if (($_dir = realpath($smarty->getCacheDir())) === false) {
+            return 0;
+        }
+        $_dir .= '/';
         $_dir_length = strlen($_dir);
         if (isset($_cache_id)) {
             $_cache_id_parts = explode('|', $_cache_id);