diff --git a/content/pdfExport.php b/content/pdfExport.php
index 1a4810032..0a72cf19f 100644
--- a/content/pdfExport.php
+++ b/content/pdfExport.php
@@ -80,7 +80,7 @@ else
 	if(isset($_GET['stg_kz']))
 		$xsl_stg_kz=$_GET['stg_kz'];
 	else
-		if(isset($_GET['uid']))
+		if(isset($_GET['uid']) && $_GET['uid']!='')
 		{
 			if(strstr(';',$_GET['uid']))
 				$uids = explode(';',$_GET['uid']);