diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index a66648df2c2..eb04115ca84 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -133,7 +133,7 @@ class ExtraFields
 	 *  @param	int		$unique				Is field unique or not
 	 *  @param	int		$required			Is field required or not
 	 *  @param	string	$default_value		Defaulted value (In database. use the default_value feature for default value on screen. Example: '', '0', 'null', 'avalue')
-	 *  @param  array	$param				Params for field
+	 *  @param  array	$param				Params for field (ex for select list : array('options' => array(value'=>'label of option')) )
 	 *  @param  int		$alwayseditable		Is attribute always editable regardless of the document status
 	 *  @param	string	$perms				Permission to check
 	 *  @param	int		$list				Into list view by default
@@ -466,13 +466,13 @@ class ExtraFields
 	 *
 	 *  @param	string	$attrname			Name of attribute
 	 *  @param	string	$label				Label of attribute
-	 *  @param	string	$type				Type of attribute
+	 *  @param	string	$type				Type of attribute ('boolean', 'int', 'text', 'varchar', 'date', 'datehour','price','phone','mail','password','url','select','checkbox', ...)
 	 *  @param	int		$length				Length of attribute
 	 *  @param  string	$elementtype        Element type ('member', 'product', 'thirdparty', 'contact', ...)
 	 *  @param	int		$unique				Is field unique or not
 	 *  @param	int		$required			Is field required or not
 	 *  @param	int		$pos				Position of attribute
-	 *  @param  array	$param				Params for field  (ex for select list : array('options' => array(value'=>'label of option')) )
+	 *  @param  array	$param				Params for field (ex for select list : array('options' => array(value'=>'label of option')) )
 	 *  @param  int		$alwayseditable		Is attribute always editable regardless of the document status
 	 *  @param	string	$perms				Permission to check
 	 *  @param	int		$list				Into list view by default