diff --git a/XMPPHP/BOSH.php b/XMPPHP/BOSH.php
index b147443..befaf60 100644
--- a/XMPPHP/BOSH.php
+++ b/XMPPHP/BOSH.php
@@ -27,7 +27,7 @@
  */
 
 /** XMPPHP_XMLStream */
-require_once "XMPP.php";
+require_once dirname(__FILE__) . "/XMPP.php";
 
 /**
  * XMPPHP Main Class
diff --git a/XMPPHP/XMLStream.php b/XMPPHP/XMLStream.php
index 0fcfea3..163b12b 100644
--- a/XMPPHP/XMLStream.php
+++ b/XMPPHP/XMLStream.php
@@ -27,13 +27,13 @@
  */
 
 /** XMPPHP_Exception */
-require_once 'Exception.php';
+require_once dirname(__FILE__) . '/Exception.php';
 
 /** XMPPHP_XMLObj */
-require_once 'XMLObj.php';
+require_once dirname(__FILE__) . '/XMLObj.php';
 
 /** XMPPHP_Log */
-require_once 'Log.php';
+require_once dirname(__FILE__) . '/Log.php';
 
 /**
  * XMPPHP XML Stream
diff --git a/XMPPHP/XMPP.php b/XMPPHP/XMPP.php
index b3ef7f7..429f45e 100644
--- a/XMPPHP/XMPP.php
+++ b/XMPPHP/XMPP.php
@@ -27,8 +27,8 @@
  */
 
 /** XMPPHP_XMLStream */
-require_once "XMLStream.php";
-require_once "Roster.php";
+require_once dirname(__FILE__) . "/XMLStream.php";
+require_once dirname(__FILE__) . "/Roster.php";
 
 /**
  * XMPPHP Main Class