diff --git a/htdocs/admin/propal.php b/htdocs/admin/propal.php
index 6384c561967..da886630ac9 100644
--- a/htdocs/admin/propal.php
+++ b/htdocs/admin/propal.php
@@ -198,6 +198,37 @@ if ($action == 'updateMask') {
 	// par appel methode canBeActivated
 
 	dolibarr_set_const($db, "PROPALE_ADDON", $value, 'chaine', 0, '', $conf->entity);
+} elseif (preg_match('/set_(.*)/', $action, $reg)) {
+	$code = $reg[1];
+	$value = (GETPOST($code) ? GETPOST($code) : 1);
+
+	$res = dolibarr_set_const($db, $code, $value, 'chaine', 0, '', $conf->entity);
+	if (!($res > 0)) {
+		$error++;
+	}
+
+	if ($error) {
+		setEventMessages($langs->trans('Error'), null, 'errors');
+	} else {
+		setEventMessages($langs->trans('SetupSaved'), null, 'mesgs');
+		header("Location: " . $_SERVER["PHP_SELF"]);
+		exit();
+	}
+} elseif (preg_match('/del_(.*)/', $action, $reg)) {
+	$code = $reg[1];
+	$res = dolibarr_del_const($db, $code, $conf->entity);
+
+	if (!($res > 0)) {
+		$error++;
+	}
+
+	if ($error) {
+		setEventMessages($langs->trans('Error'), null, 'errors');
+	} else {
+		setEventMessages($langs->trans('SetupSaved'), null, 'mesgs');
+		header("Location: " . $_SERVER["PHP_SELF"]);
+		exit();
+	}
 }
 
 
@@ -593,6 +624,26 @@ print '<td class="right"><input type="submit" class="button button-edit" value="
 print '</tr>';
 print '</form>';
 
+// default update prices on cloning a proposal
+print '<form method="post" action="' . $_SERVER["PHP_SELF"] . '">';
+print '<input type="hidden" name="token" value="' . newToken() .'">';
+print '<tr class="oddeven">';
+print '<td>' . $langs->trans('DefaultPuttingPricesUpToDate').'</td>';
+print '<td></td>';
+print '<td class="right">';
+if (!empty($conf->use_javascript_ajax)) {
+	print ajax_constantonoff('PROPOSAL_CLONE_UPDATE_PRICES', array(), $conf->entity, 0, 0, 1, 0);
+} else {
+	if (empty($conf->global->PROPOSAL_CLONE_UPDATE_PRICES)) {
+		print '<a href="' . $_SERVER['PHP_SELF'] . '?action=set_PROPOSAL_CLONE_UPDATE_PRICES">' . img_picto($langs->trans('Disabled'), 'switch_off') . '</a>';
+	} else {
+		print '<a href="' . $_SERVER['PHP_SELF'] . '?action=del_PROPOSAL_CLONE_UPDATE_PRICES">' . img_picto($langs->trans('Enabled'), 'switch_on') . '</a>';
+	}
+}
+print '</td>';
+print '</tr>';
+print '</form>';
+
 /*
 print '<form action="'.$_SERVER["PHP_SELF"].'" method="post">';
 print '<input type="hidden" name="token" value="'.newToken().'">';
diff --git a/htdocs/comm/propal/card.php b/htdocs/comm/propal/card.php
index 76a5c92b4cd..b46a1d20851 100644
--- a/htdocs/comm/propal/card.php
+++ b/htdocs/comm/propal/card.php
@@ -220,7 +220,7 @@ if (empty($reshook)) {
 					}
 				}
 
-				$result = $object->createFromClone($user, $socid, (GETPOSTISSET('entity') ? GETPOST('entity', 'int') : null));
+				$result = $object->createFromClone($user, $socid, (GETPOSTISSET('entity') ? GETPOST('entity', 'int') : null), (GETPOST('update_prices', 'aZ') ? true : false));
 				if ($result > 0) {
 					header("Location: ".$_SERVER['PHP_SELF'].'?id='.$result);
 					exit();
@@ -1917,8 +1917,8 @@ if ($action == 'create') {
 		$formquestion = array(
 			// 'text' => $langs->trans("ConfirmClone"),
 			// array('type' => 'checkbox', 'name' => 'clone_content', 'label' => $langs->trans("CloneMainAttributes"), 'value' => 1),
-			// array('type' => 'checkbox', 'name' => 'update_prices', 'label' => $langs->trans("PuttingPricesUpToDate"), 'value' => 1),
-			array('type' => 'other', 'name' => 'socid', 'label' => $langs->trans("SelectThirdParty"), 'value' => $form->select_company(GETPOST('socid', 'int'), 'socid', '(s.client=1 OR s.client=2 OR s.client=3)'))
+			array('type' => 'other', 'name' => 'socid', 'label' => $langs->trans("SelectThirdParty"), 'value' => $form->select_company(GETPOST('socid', 'int'), 'socid', '(s.client=1 OR s.client=2 OR s.client=3)')),
+			array('type' => 'checkbox', 'name' => 'update_prices', 'label' => $langs->trans('PuttingPricesUpToDate'), 'value' => (!empty($conf->global->PROPOSAL_CLONE_UPDATE_PRICES) ? 1 : 0)),
 		);
 		if (!empty($conf->global->PROPAL_CLONE_DATE_DELIVERY) && !empty($object->delivery_date)) {
 			$formquestion[] = array('type' => 'date', 'name' => 'date_delivery', 'label' => $langs->trans("DeliveryDate"), 'value' => $object->delivery_date);
diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index e7c1f520949..4f79fb41692 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -1326,11 +1326,12 @@ class Propal extends CommonObject
 	 *      @param	    User	$user		    User making the clone
 	 *		@param		int		$socid			Id of thirdparty
 	 *		@param		int		$forceentity	Entity id to force
+	 *		@param		bool	$update_prices	[=false] Update prices if true
 	 * 	 	@return		int						New id of clone
 	 */
-	public function createFromClone(User $user, $socid = 0, $forceentity = null)
+	public function createFromClone(User $user, $socid = 0, $forceentity = null, $update_prices = false)
 	{
-		global $conf, $hookmanager;
+		global $conf, $hookmanager, $mysoc;
 
 		dol_include_once('/projet/class/project.class.php');
 
@@ -1377,6 +1378,55 @@ class Propal extends CommonObject
 			$objsoc->fetch($object->socid);
 		}
 
+		// update prices
+		if ($update_prices === true) {
+			if ($objsoc->id > 0 && !empty($object->lines)) {
+				if (!empty($conf->global->PRODUIT_CUSTOMER_PRICES)) {
+					// If price per customer
+					require_once DOL_DOCUMENT_ROOT . '/product/class/productcustomerprice.class.php';
+				}
+
+				foreach ($object->lines as $line) {
+					if ($line->fk_product > 0) {
+						$prod = new Product($this->db);
+						$res = $prod->fetch($line->fk_product);
+						if ($res > 0) {
+							$pu_ht = $prod->price;
+							$tva_tx = get_default_tva($mysoc, $objsoc, $prod->id);
+							$remise_percent = $objsoc->remise_percent;
+
+							if (!empty($conf->global->PRODUIT_MULTIPRICES) && $objsoc->price_level > 0) {
+								$pu_ht = $prod->multiprices[$objsoc->price_level];
+								if (!empty($conf->global->PRODUIT_MULTIPRICES_USE_VAT_PER_LEVEL)) {  // using this option is a bug. kept for backward compatibility
+									if (isset($prod->multiprices_tva_tx[$objsoc->price_level])) {
+										$tva_tx = $prod->multiprices_tva_tx[$objsoc->price_level];
+									}
+								}
+							} elseif (!empty($conf->global->PRODUIT_CUSTOMER_PRICES)) {
+								$prodcustprice = new Productcustomerprice($this->db);
+								$filter = array('t.fk_product' => $prod->id, 't.fk_soc' => $objsoc->id);
+								$result = $prodcustprice->fetch_all('', '', 0, 0, $filter);
+								if ($result) {
+									// If there is some prices specific to the customer
+									if (count($prodcustprice->lines) > 0) {
+										$pu_ht = price($prodcustprice->lines[0]->price);
+										$tva_tx = ($prodcustprice->lines[0]->default_vat_code ? $prodcustprice->lines[0]->tva_tx.' ('.$prodcustprice->lines[0]->default_vat_code.' )' : $prodcustprice->lines[0]->tva_tx);
+										if ($prodcustprice->lines[0]->default_vat_code && !preg_match('/\(.*\)/', $tva_tx)) {
+											$tva_tx .= ' ('.$prodcustprice->lines[0]->default_vat_code.')';
+										}
+									}
+								}
+							}
+
+							$line->subprice = $pu_ht;
+							$line->tva_tx = $tva_tx;
+							$line->remise_percent = $remise_percent;
+						}
+					}
+				}
+			}
+		}
+
 		$object->id = 0;
 		$object->ref = '';
 		$object->entity = (!empty($forceentity) ? $forceentity : $object->entity);
diff --git a/htdocs/langs/en_US/products.lang b/htdocs/langs/en_US/products.lang
index b355bf49447..f843277c87a 100644
--- a/htdocs/langs/en_US/products.lang
+++ b/htdocs/langs/en_US/products.lang
@@ -414,3 +414,4 @@ SwitchOnPurchaseStatus=Switch on purchase status
 StockMouvementExtraFields= Extra Fields (stock mouvement)
 InventoryExtraFields= Extra Fields (inventory)
 ScanOrTypeOrCopyPasteYourBarCodes=Scan or type or copy/paste your barcodes
+PuttingPricesUpToDate=Update prices with current known prices
diff --git a/htdocs/langs/en_US/propal.lang b/htdocs/langs/en_US/propal.lang
index 82854821176..0efabe3163f 100644
--- a/htdocs/langs/en_US/propal.lang
+++ b/htdocs/langs/en_US/propal.lang
@@ -54,6 +54,7 @@ NoDraftProposals=No draft proposals
 CopyPropalFrom=Create commercial proposal by copying existing proposal
 CreateEmptyPropal=Create empty commercial proposal or from list of products/services
 DefaultProposalDurationValidity=Default commercial proposal validity duration (in days)
+DefaultPuttingPricesUpToDate=By default update prices with current known prices on cloning a proposal
 UseCustomerContactAsPropalRecipientIfExist=Use contact/address with type 'Contact following-up proposal' if defined instead of third party address as proposal recipient address
 ConfirmClonePropal=Are you sure you want to clone the commercial proposal <b>%s</b>?
 ConfirmReOpenProp=Are you sure you want to open back the commercial proposal <b>%s</b>?
diff --git a/htdocs/langs/fr_FR/products.lang b/htdocs/langs/fr_FR/products.lang
index 14ae8fc0423..b0073665fc2 100644
--- a/htdocs/langs/fr_FR/products.lang
+++ b/htdocs/langs/fr_FR/products.lang
@@ -411,3 +411,4 @@ Rank=Classement
 SwitchOnSaleStatus=Basculer le statut En vente
 SwitchOnPurchaseStatus=Basculer le statut En achat
 StockMouvementExtraFields= Champs supplémentaires (mouvement de stock)
+PuttingPricesUpToDate=Mettre à jour les prix
diff --git a/htdocs/langs/fr_FR/propal.lang b/htdocs/langs/fr_FR/propal.lang
index c32edfad8c1..54723a5747f 100644
--- a/htdocs/langs/fr_FR/propal.lang
+++ b/htdocs/langs/fr_FR/propal.lang
@@ -54,6 +54,7 @@ NoDraftProposals=Pas de propositions brouillons
 CopyPropalFrom=Créer proposition/devis par recopie d'un proposition existante
 CreateEmptyPropal=Créer proposition/devis vierge ou avec la liste des produits/services
 DefaultProposalDurationValidity=Délai de validité par défaut (en jours)
+DefaultPuttingPricesUpToDate=Par défaut, mettre à jour les prix lors de clonage d'une proposition commerciale
 UseCustomerContactAsPropalRecipientIfExist=Utiliser l'adresse de 'contact suivi client' si définie plutôt que l'adresse du tiers comme destinataire des propositions
 ConfirmClonePropal=Êtes-vous sûr de vouloir cloner la proposition commerciale <b>%s</b> ?
 ConfirmReOpenProp=Êtes-vous sûr de vouloir réouvrir la proposition commerciale <b>%s</b> ?