diff --git a/htdocs/core/modules/propale/doc/pdf_azur.modules.php b/htdocs/core/modules/propale/doc/pdf_azur.modules.php
index c27b8a7008ead..2a790822ea4f7 100644
--- a/htdocs/core/modules/propale/doc/pdf_azur.modules.php
+++ b/htdocs/core/modules/propale/doc/pdf_azur.modules.php
@@ -1624,6 +1624,7 @@ function _pagefoot(&$pdf,$object,$outputlangs,$hidefreetext=0)
 	 */
 	function _signature_area(&$pdf, $object, $posy, $outputlangs)
 	{
+		global $conf;
 		$default_font_size = pdf_getPDFFontSize($outputlangs);
 		$tab_top = $posy + 4;
 		$tab_hl = 4;
@@ -1640,6 +1641,9 @@ function _signature_area(&$pdf, $object, $posy, $outputlangs)
 
 		$pdf->SetXY($posx, $tab_top + $tab_hl);
 		$pdf->MultiCell($largcol, $tab_hl*3, '', 1, 'R');
+		if (! empty($conf->global->MAIN_PDF_PROPAL_USE_ELECTRONIC_SIGNING)) {
+			$pdf->addEmptySignatureAppearance($posx, $tab_top + $tab_hl, $largcol, $tab_hl*3);
+		}
 
 		return ($tab_hl*7);
 	}