diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index 5c4ed9e2edf..274c04b0698 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -654,8 +654,8 @@ class Propal extends CommonObject
 			$this->line->tva_tx = $txtva;
 			$this->line->localtax1_tx = ($total_localtax1 ? $localtaxes_type[1] : 0);
 			$this->line->localtax2_tx = ($total_localtax2 ? $localtaxes_type[3] : 0);
-			$this->line->localtax1_type = $localtaxes_type[0];
-			$this->line->localtax2_type = $localtaxes_type[2];
+			$this->line->localtax1_type = empty($localtaxes_type[0]) ? '' : $localtaxes_type[0];
+			$this->line->localtax2_type = empty($localtaxes_type[2]) ? '' : $localtaxes_type[2];
 			$this->line->fk_product = $fk_product;
 			$this->line->product_type = $type;
 			$this->line->fk_remise_except = $fk_remise_except;
diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index c2a5aee862e..d5a0df38c19 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -5037,8 +5037,8 @@ function get_localtax($vatrate, $local, $thirdparty_buyer = "", $thirdparty_sell
    	$sql .= " FROM ".MAIN_DB_PREFIX."c_tva as t, ".MAIN_DB_PREFIX."c_country as c";
    	$sql .= " WHERE t.fk_pays = c.rowid AND c.code = '".$db->escape($thirdparty_seller->country_code)."'";
    	$sql .= " AND t.taux = ".((float) $vatratecleaned)." AND t.active = 1";
-   	if ($vatratecode) $sql .= " AND t.code ='".$db->escape($vatratecode)."'"; // If we have the code, we use it in priority
-   	else $sql .= " AND t.recuperableonly ='".$db->escape($vatnpr)."'";
+   	if (!empty($vatratecode)) $sql .= " AND t.code ='".$db->escape($vatratecode)."'"; // If we have the code, we use it in priority
+   	else $sql .= " AND t.recuperableonly = '".$db->escape($vatnpr)."'";
    	dol_syslog("get_localtax", LOG_DEBUG);
    	$resql = $db->query($sql);