diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index 915951c0cb9f985b3febf08cf54ec5a28b007306..7890f9036b424478383a5b6d26e8ca2e69c44e1a 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -939,6 +939,9 @@ class Propal extends CommonObject
                 $this->fk_delivery_address	= '';
             }
 
+            // reset ref_client
+             $this->ref_client  = '';
+
             // TODO Change product price if multi-prices
         }
         else
@@ -961,7 +964,7 @@ class Propal extends CommonObject
         $this->date			= $now;
         $this->datep		= $now;    // deprecated
         $this->fin_validite	= $this->date + ($this->duree_validite * 24 * 3600);
-        $this->ref_client	= '';
+        if (empty(MAIN_KEEP_REF_CUSTOMER_ON_CLONING)) $this->ref_client	= '';
 
         // Set ref
         require_once DOL_DOCUMENT_ROOT ."/core/modules/propale/".$conf->global->PROPALE_ADDON.'.php';