diff --git a/calendar/inc/gradient.php b/calendar/inc/gradient.php
index d79593d5ce..244a74121f 100644
--- a/calendar/inc/gradient.php
+++ b/calendar/inc/gradient.php
@@ -10,6 +10,7 @@
  * @version $Id$
  */
 
+include_once('../../phpgwapi/inc/common_functions.inc.php');
 check_load_extension('gd',true);	// true = throw exception if not loadable
 
 foreach(array('width'=>1,'height'=>1,'color1'=>'000080','color2'=>'ffffff') as $name => $default)
diff --git a/calendar/inc/round_corners.php b/calendar/inc/round_corners.php
index 9ee50443c4..7f7e3b1d87 100644
--- a/calendar/inc/round_corners.php
+++ b/calendar/inc/round_corners.php
@@ -10,6 +10,7 @@
  * @version $Id$
  */
 
+include_once('../../phpgwapi/inc/common_functions.inc.php');
 check_load_extension('gd',true);	// true = throw exception if not loadable
 
 foreach(array('width'=>-20,'height'=>40,'border'=>1,'color'=>'000080','bgcolor'=>'0000FF') as $name => $default)