diff --git a/htdocs/core/lib/pdf.lib.php b/htdocs/core/lib/pdf.lib.php
index 4790ed204b8..db3b8763941 100644
--- a/htdocs/core/lib/pdf.lib.php
+++ b/htdocs/core/lib/pdf.lib.php
@@ -44,7 +44,7 @@ function pdf_getFormat(Translate $outputlangs = null, $mode = 'setup')
 {
 	global $conf, $db, $langs;
 
-	dol_syslog("pdf_getFormat Get paper format with mode='.$mode.' MAIN_PDF_FORMAT=".(empty($conf->global->MAIN_PDF_FORMAT)?'null':$conf->global->MAIN_PDF_FORMAT)." outputlangs->defaultlang=".(is_object($outputlangs) ? $outputlangs->defaultlang : 'null')." and langs->defaultlang=".(is_object($langs) ? $langs->defaultlang : 'null'));
+	dol_syslog("pdf_getFormat Get paper format with mode=".$mode." MAIN_PDF_FORMAT=".(empty($conf->global->MAIN_PDF_FORMAT)?'null':$conf->global->MAIN_PDF_FORMAT)." outputlangs->defaultlang=".(is_object($outputlangs) ? $outputlangs->defaultlang : 'null')." and langs->defaultlang=".(is_object($langs) ? $langs->defaultlang : 'null'));
 
 	// Default value if setup was not done and/or entry into c_paper_format not defined
 	$width=210; $height=297; $unit='mm';