diff --git a/lib/plugins/pluginutil.inc.php b/lib/plugins/pluginutil.inc.php
index c73b638..2701be0 100644
--- a/lib/plugins/pluginutil.inc.php
+++ b/lib/plugins/pluginutil.inc.php
@@ -701,10 +701,10 @@ class KTPluginUtil {
         if(PEAR::isError($oEntity)){
             return $oEntity;
         }
-        $dir = dirname($oEntity->getPath()) . DIRECTORY_SEPARATOR;
+        $dir = dirname($oEntity->getPath()) . '/';
 
         if(!$relative){
-            $dir = KT_DIR . DIRECTORY_SEPARATOR . $dir;
+            $dir = KT_DIR . '/' . $dir;
         }
 
         return $dir;