diff --git a/htdocs/core/lib/pdf.lib.php b/htdocs/core/lib/pdf.lib.php
index d16fc569961..b233b937be7 100644
--- a/htdocs/core/lib/pdf.lib.php
+++ b/htdocs/core/lib/pdf.lib.php
@@ -240,14 +240,18 @@ function pdf_getPDFFont($outputlangs)
  */
 function pdf_getPDFFontSize($outputlangs)
 {
+	global $conf;
+
 	$size=10;                   // By default, for FPDI or ISO language on TCPDF
-	if (class_exists('TCPDF'))  // If TCPDF on, we can use an UTF8 one like DejaVuSans if required (slower)
+	if (class_exists('TCPDF'))  // If TCPDF on, we can use an UTF8 font like DejaVuSans if required (slower)
 	{
-		if ($outputlangs->trans('FONTSIZEFORPDF')!='FONTSIZEFORPDF')
+		if ($outputlangs->trans('FONTSIZEFORPDF') != 'FONTSIZEFORPDF')
 		{
 			$size = (int) $outputlangs->trans('FONTSIZEFORPDF');
 		}
 	}
+	if (! empty($conf->global->MAIN_PDF_FORCE_FONT_SIZE)) $size = $conf->global->MAIN_PDF_FORCE_FONT_SIZE;
+
 	return $size;
 }