diff --git a/htdocs/core/lib/invoice2.lib.php b/htdocs/core/lib/invoice2.lib.php
index d5be39aff0f623a9f19b3d3fae233818e9398cfc..ccc115b5b1d327066a9f7451e6d4e90770c7a17f 100644
--- a/htdocs/core/lib/invoice2.lib.php
+++ b/htdocs/core/lib/invoice2.lib.php
@@ -41,12 +41,13 @@ require_once(DOL_DOCUMENT_ROOT.'/core/lib/pdf.lib.php');
  * @param 	date		$paymentdatebefore		Payment before date (must includes hour)
  * @param	int			$usestdout				Add information onto standard output
  * @param	int			$regenerate				''=Use existing PDF files, 'nameofpdf'=Regenerate all PDF files using the template
- * @param	string		$option					Suffix to add into file name of generated PDF
+ * @param	string		$filesuffix				Suffix to add into file name of generated PDF
  * @param	string		$paymentbankid			Only if payment on this bank account id
  * @param	array		$thirdpartiesid			List of thirdparties id when using filter excludethirdpartiesid	or onlythirdpartiesid
+ * @param	string		$fileprefix				Prefix to add into filename of generated PDF
  * @return	int									Error code
  */
-function rebuild_merge_pdf($db, $langs, $conf, $diroutputpdf, $newlangid, $filter, $dateafterdate, $datebeforedate, $paymentdateafter, $paymentdatebefore, $usestdout, $regenerate=0, $option='', $paymentbankid='', $thirdpartiesid='')
+function rebuild_merge_pdf($db, $langs, $conf, $diroutputpdf, $newlangid, $filter, $dateafterdate, $datebeforedate, $paymentdateafter, $paymentdatebefore, $usestdout, $regenerate=0, $filesuffix='', $paymentbankid='', $thirdpartiesid='', $fileprefix='mergedpdf')
 {
 	$sql = "SELECT DISTINCT f.rowid, f.facnumber";
 	$sql.= " FROM ".MAIN_DB_PREFIX."facture as f";
@@ -220,13 +221,6 @@ function rebuild_merge_pdf($db, $langs, $conf, $diroutputpdf, $newlangid, $filte
 	        if ($conf->global->MAIN_DISABLE_PDF_COMPRESSION) $pdf->SetCompression(false);
 			//$pdf->SetCompression(false);
 
-
-			//$pdf->Open();
-			//$pdf->AddPage();
-			//$title=$langs->trans("BillsCustomersUnpaid");
-			//if ($option=='late') $title=$langs->trans("BillsCustomersUnpaid");
-			//$pdf->MultiCell(100, 3, $title, 0, 'J');
-
 			// Add all others
 			foreach($files as $file)
 			{
@@ -248,9 +242,9 @@ function rebuild_merge_pdf($db, $langs, $conf, $diroutputpdf, $newlangid, $filte
 			dol_mkdir($diroutputpdf);
 
 			// Save merged file
-			$filename='mergedpdf';
-
-			if (! empty($option)) $filename.='_'.$option;
+			$filename=$fileprefix;
+			if (empty($filename)) $filename='mergedpdf';
+			if (! empty($filesuffix)) $filename.='_'.$filesuffix;
 			$file=$diroutputpdf.'/'.$filename.'.pdf';
 
 			if (! $error && $pagecount)
diff --git a/scripts/invoices/rebuild_merge_pdf.php b/scripts/invoices/rebuild_merge_pdf.php
index 357a09ccdbea69f6cc05a27345206420e85ff9e9..6fbcdb59538a82ba4990575bda0432421253d895 100755
--- a/scripts/invoices/rebuild_merge_pdf.php
+++ b/scripts/invoices/rebuild_merge_pdf.php
@@ -71,6 +71,7 @@ $newlangid='en_EN';	// To force a new lang id
 $filter=array();
 $regenerate='';		// Ask regenerate (contains name of model to use)
 $option='';
+$fileprefix='mergedpdf';
 
 foreach ($argv as $key => $value)
 {
@@ -84,6 +85,13 @@ foreach ($argv as $key => $value)
 		$newlangid=$valarray[1];
 		print 'Use language '.$newlangid.".\n";
 	}
+	if (preg_match('/^prefix=/i',$value))
+	{
+		$found=true;
+		$valarray=explode('=',$value);
+		$fileprefix=$valarray[1];
+		print 'Use prefix for filename '.$fileprefix.".\n";
+	}
 
 	if (preg_match('/^regenerate=(.*)/i',$value,$reg))
 	{
@@ -232,7 +240,7 @@ if (in_array('bank',$filter) && in_array('nopayment',$filter))
 
 // Define SQL and SQL request to select invoices
 // Use $filter, $dateafterdate, datebeforedate, $paymentdateafter, $paymentdatebefore
-$result=rebuild_merge_pdf($db, $langs, $conf, $diroutputpdf, $newlangid, $filter, $dateafterdate, $datebeforedate, $paymentdateafter, $paymentdatebefore, 1, $regenerate, $option, $paymentonbankid, $thirdpartiesid);
+$result=rebuild_merge_pdf($db, $langs, $conf, $diroutputpdf, $newlangid, $filter, $dateafterdate, $datebeforedate, $paymentdateafter, $paymentdatebefore, 1, $regenerate, $option, $paymentonbankid, $thirdpartiesid, $fileprefix);
 
 
 
@@ -283,6 +291,7 @@ function usage()
     print "To limit to some thirdparties, use filter=onlythirdparties id1,id2...\n";
     print "To regenerate existing PDF, use regenerate=crabe\n";
     print "To generate invoices in a language, use lang=xx_XX\n";
+    print "To set prefix of generated file name, use prefix=myfileprefix\n";
     print "\n";
 	print "Example: ".$script_file." filter=payments 20080101 20081231 lang=fr_FR regenerate=crabe\n";
 	print "Example: ".$script_file." filter=all lang=en_US\n";