diff --git a/htdocs/core/lib/pdf.lib.php b/htdocs/core/lib/pdf.lib.php
index 5765319379a..247fbb20c14 100644
--- a/htdocs/core/lib/pdf.lib.php
+++ b/htdocs/core/lib/pdf.lib.php
@@ -1868,6 +1868,7 @@ function pdf_getlineremisepercent($object,$i,$outputlangs,$hidedetails=0)
 function pdf_getlineprogress($object, $i, $outputlangs, $hidedetails = 0, $hookmanager = null)
 {
 	if (empty($hookmanager)) global $hookmanager;
+	global $conf;
 
 	$reshook=0;
     $result='';