diff --git a/ChangeLog b/ChangeLog
index 8d51bd475ac..f22a34a385a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -39,6 +39,7 @@ For users:
 - New: [ task #326 ]: Add a numbering module to suggest automatically a product ref
 - New: Add conditional substitution IF/ELSEIF/ENDIF for ODT templates
 - New: Add unit foot2, inch2, foot3 and inch3 for surface and volumes.
+- New: Can select thirdparties into emailing targets, even if module category is not enabled.
 - Fix: [ bug #499 ]: Supplier order input method not translated
 - Fix: No images into product description lines as PDF generation does
   not work with this.
diff --git a/htdocs/core/modules/mailings/thirdparties.modules.php b/htdocs/core/modules/mailings/thirdparties.modules.php
index 33c59091a3d..6c6bdcf61e0 100755
--- a/htdocs/core/modules/mailings/thirdparties.modules.php
+++ b/htdocs/core/modules/mailings/thirdparties.modules.php
@@ -19,20 +19,15 @@ include_once DOL_DOCUMENT_ROOT.'/core/modules/mailings/modules_mailings.php';
 
 
 /**
- *	    \class      mailing_thirdparties
- *		\brief      Class to manage a list of personalised recipients for mailing feature
+ *	Class to manage a list of personalised recipients for mailing feature
  */
 class mailing_thirdparties extends MailingTargets
 {
-	// CHANGE THIS: Put here a name not already used
 	var $name='ContactsCategories';
-	// CHANGE THIS: Put here a description of your selector module.
-	// This label is used if no translation found for key MailingModuleDescXXX where XXX=name is found
 	var $desc="Third parties (by categories)";
-	// CHANGE THIS: Set to 1 if selector is available for admin users only
 	var $require_admin=0;
 
-	var $require_module=array("categorie","societe");
+	var $require_module=array("societe");	// This module allows to select by categories must be also enabled if category module is not activated
 	var $picto='company';
 	var $db;
 
@@ -44,6 +39,8 @@ class mailing_thirdparties extends MailingTargets
 	 */
 	function __construct($db)
 	{
+		global $conf;
+
 		$this->db=$db;
 	}
 
@@ -151,11 +148,12 @@ class mailing_thirdparties extends MailingTargets
 	}
 
 
-	/*
-	 *		\brief		Return here number of distinct emails returned by your selector.
-	 *					For example if this selector is used to extract 500 different
-	 *					emails from a text file, this function must return 500.
-	 *		\return		int
+	/**
+	 *	Return here number of distinct emails returned by your selector.
+	 *	For example if this selector is used to extract 500 different
+	 *	emails from a text file, this function must return 500.
+	 *
+	 *	@return		int			Nb of recipients
 	 */
 	function getNbOfRecipients()
 	{
@@ -200,6 +198,8 @@ class mailing_thirdparties extends MailingTargets
 		{
 			$num = $this->db->num_rows($resql);
 
+			if (empty($conf->categorie->enabled)) $num=0;	// Force empty list if category module is not enabled
+
 			if ($num) $s.='<option value="0">&nbsp;</option>';
 			else $s.='<option value="0">'.$langs->trans("ContactsAllShort").'</option>';
 
diff --git a/htdocs/core/modules/mailings/thirdparties_services_expired.modules.php b/htdocs/core/modules/mailings/thirdparties_services_expired.modules.php
index 46cc1d0a6b4..15b3ad6f0d4 100755
--- a/htdocs/core/modules/mailings/thirdparties_services_expired.modules.php
+++ b/htdocs/core/modules/mailings/thirdparties_services_expired.modules.php
@@ -18,8 +18,7 @@ require_once DOL_DOCUMENT_ROOT.'/core/lib/functions2.lib.php';
 
 
 /**
- *	\class      mailing_thirdparties_services_expired
- *	\brief      Class to offer a selector of emailing targets with Rule 'services expired'.
+ *	Class to offer a selector of emailing targets with Rule 'services expired'.
  */
 class mailing_thirdparties_services_expired extends MailingTargets
 {