diff --git a/htdocs/core/modules/livraison/doc/pdf_typhon.modules.php b/htdocs/core/modules/livraison/doc/pdf_typhon.modules.php
index 365fbef4cdf..340882a3e5a 100644
--- a/htdocs/core/modules/livraison/doc/pdf_typhon.modules.php
+++ b/htdocs/core/modules/livraison/doc/pdf_typhon.modules.php
@@ -395,7 +395,7 @@ class pdf_typhon extends ModelePDFDeliveryOrder
 					 */
 
 					// Add line
-					if (! empty($conf->global->MAIN_PDF_DASH_BETWEEN_LINES) && $i < ($nblines - 1))
+					if ($conf->global->MAIN_PDF_DASH_BETWEEN_LINES && $i < ($nblines - 1))
 					{
 						$pdf->setPage($pageposafter);
 						$pdf->SetLineStyle(array('dash'=>'1,1','color'=>array(210,210,210)));
diff --git a/htdocs/core/modules/project/doc/pdf_baleine.modules.php b/htdocs/core/modules/project/doc/pdf_baleine.modules.php
index db0017a2e98..c40b8bb93a1 100644
--- a/htdocs/core/modules/project/doc/pdf_baleine.modules.php
+++ b/htdocs/core/modules/project/doc/pdf_baleine.modules.php
@@ -242,7 +242,7 @@ class pdf_baleine extends ModelePDFProjects
 					$nexY = $pdf->GetY();
 
 					// Add line
-					if (! empty($conf->global->MAIN_PDF_DASH_BETWEEN_LINES) && $i < ($nblignes - 1))
+					if ($conf->global->MAIN_PDF_DASH_BETWEEN_LINES && $i < ($nblignes - 1))
 					{
 						$pdf->setPage($pageposafter);
 						$pdf->SetLineStyle(array('dash'=>'1,1','color'=>array(210,210,210)));