diff --git a/lam/lib/pdf.inc b/lam/lib/pdf.inc
index e3f5b4ae..315d94b1 100644
--- a/lam/lib/pdf.inc
+++ b/lam/lib/pdf.inc
@@ -150,7 +150,7 @@ function createModulePDF($accounts,$pdf_structure="default") {
 	$subdirs = explode('/', str_replace($_SESSION['lampath'], '', $fullpath));
 	for ($i=0; $i<count($subdirs); $i++ ) $filename .= '../';
 	// use timestamp and random number from ldap.inc as filename so it should be unique.
-	$filename .= 'tmp/' . $_SESSION['ldap']->rand . time() .'.pdf';
+	$filename .= 'tmp/' . $_SESSION['ldap']->new_rand() . time() .'.pdf';
 	// Save PDF
 	$pdf->Output($filename);
 	// Output meta refresh to pdf-file