diff --git a/serendipity_event_lsrstopper/serendipity_event_lsrstopper.php b/serendipity_event_lsrstopper/serendipity_event_lsrstopper.php
index e7cb2d1b..44368919 100644
--- a/serendipity_event_lsrstopper/serendipity_event_lsrstopper.php
+++ b/serendipity_event_lsrstopper/serendipity_event_lsrstopper.php
@@ -1,5 +1,9 @@
 <?php
 
+if (IN_serendipity !== true) {
+    die ("Don't hack!");
+}
+
 @serendipity_plugin_api::load_language(dirname(__FILE__));
 
 /**
@@ -238,6 +242,9 @@ class serendipity_event_lsrstopper extends serendipity_event
     protected function getCacheFilename($url)
     {
         global $serendipity;
+        if (!defined('PATH_SMARTY_COMPILE')) {
+            return '';
+        }
         return $serendipity['serendipityPath'] . '/' . PATH_SMARTY_COMPILE . '/lsrstopper/' . md5($url);
     }
 
diff --git a/serendipity_event_lsrstopper/tests/lsrstopperTest.php b/serendipity_event_lsrstopper/tests/lsrstopperTest.php
index 436bf565..f56375db 100644
--- a/serendipity_event_lsrstopper/tests/lsrstopperTest.php
+++ b/serendipity_event_lsrstopper/tests/lsrstopperTest.php
@@ -1,7 +1,7 @@
 <?php
 
 require_once S9Y_INCLUDE_PATH . 'tests/plugins/PluginTest.php';
-require_once S9Y_INCLUDE_PATH . 'plugins/serendipity_event_lsrstopper/serendipity_event_lsrstopper.php';
+require_once S9Y_INCLUDE_PATH . 'plugins/additional_plugins/serendipity_event_lsrstopper/serendipity_event_lsrstopper.php';
 
 /**
  * Class serendipity_event_lsrstopperTest