diff --git a/htdocs/compta/bank/class/account.class.php b/htdocs/compta/bank/class/account.class.php
index d1fec4a5a6d..7228214e51c 100644
--- a/htdocs/compta/bank/class/account.class.php
+++ b/htdocs/compta/bank/class/account.class.php
@@ -395,7 +395,7 @@ class Account extends CommonObject
 	 *  @param	string		$emetteur		Name of cheque writer
 	 *  @param	string		$banque			Bank of cheque writer
 	 *  @param	string		$accountancycode	When we record a free bank entry, we must provide accounting account if accountancy module is on.
-	 *  @param	int			$datevalue		Date value
+	 *  @param	int			$datev			Date value
 	 *  @return	int							Rowid of added entry, <0 if KO
 	 */
 	function addline($date, $oper, $label, $amount, $num_chq, $categorie, User $user, $emetteur='',$banque='', $accountancycode='', $datev=null)
diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 0c3ddab9e2d..046097eec86 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -6659,7 +6659,7 @@ abstract class CommonObject
 					}
 					$queryarray[$field] = serialize($this->{$field});
 				} else {
-					$queryarray[$field] = NULL;
+					$queryarray[$field] = null;
 				}
 			}
 			else if($this->isInt($info))
diff --git a/htdocs/core/lib/tax.lib.php b/htdocs/core/lib/tax.lib.php
index e432b741929..0d46503c51b 100644
--- a/htdocs/core/lib/tax.lib.php
+++ b/htdocs/core/lib/tax.lib.php
@@ -88,7 +88,7 @@ function tax_prepare_head(ChargeSociales $object)
  *  @param  int		$q           	Quarter
  *  @return array       			Array with details of VATs (per third parties), -1 if no accountancy module, -2 if not yet developped, -3 if error
  */
-function tax_by_thirdparty($type='vat', $db, $y, $date_start, $date_end, $modetax, $direction, $m=0, $q=0)
+function tax_by_thirdparty($type, $db, $y, $date_start, $date_end, $modetax, $direction, $m=0, $q=0)
 {
     global $conf;