diff --git a/htdocs/core/ajax/onlineSign.php b/htdocs/core/ajax/onlineSign.php
index 0577ee63bea..939c5fdce32 100644
--- a/htdocs/core/ajax/onlineSign.php
+++ b/htdocs/core/ajax/onlineSign.php
@@ -173,7 +173,7 @@ if ($action == "importSignature") {
 						$wforimg = $s['w'] - 20 - $xforimgstart;
 
 						$pdf->SetXY($xforimgstart, $yforimgstart + round($wforimg / 4) - 4);
-						$pdf->SetFont($default_font, '', $default_font_size);
+						$pdf->SetFont($default_font, '', $default_font_size - 1);
 						$pdf->MultiCell($wforimg, 4, $langs->trans("DateSigning").': '.dol_print_date(dol_now(), "daytext", false, $langs, true), 0, 'L');
 						$pdf->SetXY($xforimgstart, $yforimgstart + round($wforimg / 4));
 						$pdf->MultiCell($wforimg, 4, $langs->trans("Lastname").': '.$online_sign_name, 0, 'L');