diff --git a/htdocs/core/modules/modStockTransfer.class.php b/htdocs/core/modules/modStockTransfer.class.php
index 2bbfc99555f..affb6575dcb 100644
--- a/htdocs/core/modules/modStockTransfer.class.php
+++ b/htdocs/core/modules/modStockTransfer.class.php
@@ -435,26 +435,26 @@ class modStockTransfer extends DolibarrModules
 
 		$sql = array();
 
-		// Rôles
-		$resql = $this->db->query('SELECT rowid FROM '.MAIN_DB_PREFIX.'c_type_contact WHERE code = "STDEST" AND element = "StockTransfer" AND source = "internal"');
+		// Roles
+		$resql = $this->db->query("SELECT rowid FROM ".MAIN_DB_PREFIX."c_type_contact WHERE code = 'STDEST' AND element = 'stocktransfer' AND source = 'internal'");
 		$res = $this->db->fetch_object($resql);
 		$nextid=$this->getNextId();
 		if (empty($res)) {
-			$this->db->query('INSERT INTO '.MAIN_DB_PREFIX.'c_type_contact(rowid, element, source, code, libelle, active, module, position) VALUES('.((int) $nextid).', "StockTransfer", "internal", "STRESP", "Responsible for stock transfers", 1, NULL, 0)');
+			$this->db->query("INSERT INTO ".MAIN_DB_PREFIX."c_type_contact(rowid, element, source, code, libelle, active, module, position) VALUES(".((int) $nextid).", 'stocktransfer', 'internal', 'STRESP', 'Responsible for stock transfers', 1, NULL, 0)");
 		}
 
-		$resql = $this->db->query('SELECT rowid FROM '.MAIN_DB_PREFIX.'c_type_contact WHERE code = "STFROM" AND element = "StockTransfer" AND source = "external"');
+		$resql = $this->db->query("SELECT rowid FROM ".MAIN_DB_PREFIX."c_type_contact WHERE code = 'STFROM' AND element = 'stocktransfer' AND source = 'external'");
 		$res = $this->db->fetch_object($resql);
 		$nextid=$this->getNextId();
 		if (empty($res)) {
-			$this->db->query('INSERT INTO '.MAIN_DB_PREFIX.'c_type_contact(rowid, element, source, code, libelle, active, module, position) VALUES('.((int) $nextid).', "StockTransfer", "external", "STFROM", "Contact sending the stock transfer", 1, NULL, 0)');
+			$this->db->query("INSERT INTO ".MAIN_DB_PREFIX."c_type_contact(rowid, element, source, code, libelle, active, module, position) VALUES(".((int) $nextid).", 'stocktransfer', 'external', 'STFROM', 'Contact sending the stock transfer', 1, NULL, 0)");
 		}
 
-		$resql = $this->db->query('SELECT rowid FROM '.MAIN_DB_PREFIX.'c_type_contact WHERE code = "STDEST" AND element = "StockTransfer" AND source = "external"');
+		$resql = $this->db->query("SELECT rowid FROM ".MAIN_DB_PREFIX."c_type_contact WHERE code = 'STDEST' AND element = 'stocktransfer' AND source = 'external'");
 		$res = $this->db->fetch_object($resql);
 		$nextid=$this->getNextId();
 		if (empty($res)) {
-			$this->db->query('INSERT INTO '.MAIN_DB_PREFIX.'c_type_contact(rowid, element, source, code, libelle, active, module, position) VALUES('.((int) $nextid).', "StockTransfer", "external", "STDEST", "Contact receiving the stock transfer", 1, NULL, 0)');
+			$this->db->query("INSERT INTO ".MAIN_DB_PREFIX."c_type_contact(rowid, element, source, code, libelle, active, module, position) VALUES(".((int) $nextid).", 'stocktransfer', 'external', 'STDEST', 'Contact receiving the stock transfer', 1, NULL, 0)");
 		}
 
 		return $this->_init($sql, $options);