diff --git a/htdocs/core/modules/DolibarrModules.class.php b/htdocs/core/modules/DolibarrModules.class.php
index daf0ed5b234..861017b2844 100644
--- a/htdocs/core/modules/DolibarrModules.class.php
+++ b/htdocs/core/modules/DolibarrModules.class.php
@@ -222,7 +222,7 @@ class DolibarrModules // Can not be abstract, because we need to instantiate it
 
     public $export_permission;
     public $export_fields_array;
-    public $export_TypeFields_array;
+    public $export_TypeFields_array;		// Array of key=>type where type can be 'Numeric', 'Date', 'Text', 'Boolean', 'Status', 'List:xxx:login:rowid'
     public $export_entities_array;
     public $export_special_array;           // special or computed field
     public $export_dependencies_array;
diff --git a/htdocs/core/modules/modUser.class.php b/htdocs/core/modules/modUser.class.php
index b21ec913220..6e5924945c9 100644
--- a/htdocs/core/modules/modUser.class.php
+++ b/htdocs/core/modules/modUser.class.php
@@ -233,7 +233,7 @@ class modUser extends DolibarrModules
 			'u.fk_socpeople'=>"IdContact",'u.fk_soc'=>"IdCompany",'u.fk_member'=>"MemberId"
 		);
 		$this->export_TypeFields_array[$r]=array(
-			'u.login'=>"Text",'u.lastname'=>"Text",'u.firstname'=>"Text",'u.employee'=>'Boolean','u.job'=>'Text',
+			'u.rowid'=>'Numeric', 'u.login'=>"Text",'u.lastname'=>"Text",'u.firstname'=>"Text",'u.employee'=>'Boolean','u.job'=>'Text',
 		    'u.accountancy_code'=>'Text',
 		    'u.address'=>"Text",'u.zip'=>"Text",'u.town'=>"Text",
 		    'u.office_phone'=>'Text','u.user_mobile'=>'Text','u.office_fax'=>'Text',
diff --git a/htdocs/exports/class/export.class.php b/htdocs/exports/class/export.class.php
index 0274e493170..06813b03ae5 100644
--- a/htdocs/exports/class/export.class.php
+++ b/htdocs/exports/class/export.class.php
@@ -52,10 +52,10 @@ class Export
 	public $array_export_help=array();			   // array with tooltip help for fields
 
     // To store export modules
-    public $hexa;
-    public $hexafiltervalue;
+    public $hexa;									// List of fields in the export profile
+    public $hexafiltervalue;						// List of search criteria in the export profile
     public $datatoexport;
-    public $model_name;
+    public $model_name;								// Name of export profile
 
     public $sqlusedforexport;