diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index 5b5fe89fc7d..423fff2f21f 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -1413,8 +1413,8 @@ class Propal extends CommonObject
                         $line->fk_product_type  = $objp->fk_product_type;
 	                    $line->fk_unit          = $objp->fk_unit;
 
-                        $line->date_start  		= $objp->date_start;
-                        $line->date_end  		= $objp->date_end;
+                        $line->date_start  		= $this->db->jdate($objp->date_start);
+                        $line->date_end  		= $this->db->jdate($objp->date_end);
 
 
 						// Multicurrency