diff --git a/htdocs/product/stock/stocktransfer/class/stocktransfer.class.php b/htdocs/product/stock/stocktransfer/class/stocktransfer.class.php
index d8f987a5b53..a144895e836 100644
--- a/htdocs/product/stock/stocktransfer/class/stocktransfer.class.php
+++ b/htdocs/product/stock/stocktransfer/class/stocktransfer.class.php
@@ -849,7 +849,7 @@ class StockTransfer extends CommonObject
 		$sql = 'SELECT rowid, date_creation as datec, tms as datem,';
 		$sql .= ' fk_user_creat, fk_user_modif';
 		$sql .= ' FROM '.MAIN_DB_PREFIX.$this->table_element.' as t';
-		$sql .= ' WHERE t.rowid = '.$id;
+		$sql .= ' WHERE t.rowid = '.((int) $id);
 		$result = $this->db->query($sql);
 		if ($result) {
 			if ($this->db->num_rows($result)) {
diff --git a/htdocs/product/stock/stocktransfer/class/stocktransferline.class.php b/htdocs/product/stock/stocktransfer/class/stocktransferline.class.php
index 3a362395dd8..31549e04832 100644
--- a/htdocs/product/stock/stocktransfer/class/stocktransferline.class.php
+++ b/htdocs/product/stock/stocktransfer/class/stocktransferline.class.php
@@ -873,7 +873,7 @@ class StockTransferLine extends CommonObjectLine
 		$sql = 'SELECT rowid, date_creation as datec, tms as datem,';
 		$sql .= ' fk_user_creat, fk_user_modif';
 		$sql .= ' FROM '.MAIN_DB_PREFIX.$this->table_element.' as t';
-		$sql .= ' WHERE t.rowid = '.$id;
+		$sql .= ' WHERE t.rowid = '.((int) $id);
 		$result = $this->db->query($sql);
 		if ($result) {
 			if ($this->db->num_rows($result)) {
@@ -929,7 +929,7 @@ class StockTransferLine extends CommonObjectLine
 		$this->lines = array();
 
 		$objectline = new StockTransferLineLine($this->db);
-		$result = $objectline->fetchAll('ASC', 'position', 0, 0, array('customsql'=>'fk_stocktransferline = '.$this->id));
+		$result = $objectline->fetchAll('ASC', 'position', 0, 0, array('customsql'=>'fk_stocktransferline = '.((int) $this->id)));
 
 		if (is_numeric($result)) {
 			$this->error = $this->error;