diff --git a/htdocs/contact/canvas/actions_contactcard_common.class.php b/htdocs/contact/canvas/actions_contactcard_common.class.php
index 925d8bf2039..234df487888 100644
--- a/htdocs/contact/canvas/actions_contactcard_common.class.php
+++ b/htdocs/contact/canvas/actions_contactcard_common.class.php
@@ -25,7 +25,7 @@
  *	\class      ActionsContactCardCommon
  *	\brief      Classe permettant la gestion des contacts par defaut
  */
-class ActionsContactCardCommon
+abstract class ActionsContactCardCommon
 {
     var $db;
     var $targetmodule;
diff --git a/htdocs/core/class/stats.class.php b/htdocs/core/class/stats.class.php
index 380859d3c14..c302b215d66 100644
--- a/htdocs/core/class/stats.class.php
+++ b/htdocs/core/class/stats.class.php
@@ -26,7 +26,7 @@
  * 		\class		Stats
  * 		\brief		Parent class of statistics class
  */
-class Stats
+abstract class Stats
 {
 	var $db ;
 
diff --git a/htdocs/includes/boxes/modules_boxes.php b/htdocs/includes/boxes/modules_boxes.php
index f13f26adc41..bd482efc50f 100644
--- a/htdocs/includes/boxes/modules_boxes.php
+++ b/htdocs/includes/boxes/modules_boxes.php
@@ -27,7 +27,7 @@
  *	    \class      ModeleBoxes
  *		\brief      Classe mere des boites
  */
-class ModeleBoxes
+class ModeleBoxes    // Can't be abtract as it is instanciated to build "empty" boxes
 {
 	var $db;
 	var $error='';
@@ -101,7 +101,7 @@ class ModeleBoxes
 		$bcx[1] = 'class="box_impair"';
 		$var = false;
 
-		dol_syslog("ModeleBoxes::showBox ".get_Class($this));
+		dol_syslog(get_Class($this));
 
 		// Define nbcol and nblines of the box to show
 		$nbcol=0;
diff --git a/htdocs/includes/modules/DolibarrModules.class.php b/htdocs/includes/modules/DolibarrModules.class.php
index 1a2fb1c1111..b17dd7be4cd 100644
--- a/htdocs/includes/modules/DolibarrModules.class.php
+++ b/htdocs/includes/modules/DolibarrModules.class.php
@@ -30,7 +30,7 @@
  *  \class      DolibarrModules
  *  \brief      Classe mere des classes de description et activation des modules Dolibarr
  */
-class DolibarrModules
+abstract class DolibarrModules
 {
     //! Database handler
     var $db;
diff --git a/htdocs/includes/modules/barcode/modules_barcode.php b/htdocs/includes/modules/barcode/modules_barcode.php
index fbc1ce82fea..5b3a782adc1 100644
--- a/htdocs/includes/modules/barcode/modules_barcode.php
+++ b/htdocs/includes/modules/barcode/modules_barcode.php
@@ -31,7 +31,7 @@ require_once(DOL_DOCUMENT_ROOT.'/lib/functions.lib.php');
  *  \class      ModeleBarCode
  *	\brief      Classe mere des modeles de code barre
  */
-class ModeleBarCode
+abstract class ModeleBarCode
 {
 	var $error='';
 
diff --git a/htdocs/includes/modules/mailings/modules_mailings.php b/htdocs/includes/modules/mailings/modules_mailings.php
index 14b85d7f628..c3cf5a77900 100644
--- a/htdocs/includes/modules/mailings/modules_mailings.php
+++ b/htdocs/includes/modules/mailings/modules_mailings.php
@@ -30,7 +30,7 @@ require_once(DOL_DOCUMENT_ROOT.'/lib/functions.lib.php');
  *	    \class      MailingTargets
  *		\brief      Parent class of emailing target selectors modules
  */
-class MailingTargets
+abstract class MailingTargets
 {
     var $db='';
     var $error='';
diff --git a/htdocs/includes/modules/security/generate/modules_genpassword.php b/htdocs/includes/modules/security/generate/modules_genpassword.php
index be808086854..e3b58d5c6a5 100644
--- a/htdocs/includes/modules/security/generate/modules_genpassword.php
+++ b/htdocs/includes/modules/security/generate/modules_genpassword.php
@@ -28,7 +28,7 @@ require_once(DOL_DOCUMENT_ROOT.'/lib/functions.lib.php');
  *  \class      ModeleGenPassword
  *  \brief      Parent class for password rules/management modules
  */
-class ModeleGenPassword
+abstract class ModeleGenPassword
 {
 	var $error='';
 
diff --git a/htdocs/societe/canvas/actions_card_common.class.php b/htdocs/societe/canvas/actions_card_common.class.php
index db6800b6f32..f8a09618e2d 100644
--- a/htdocs/societe/canvas/actions_card_common.class.php
+++ b/htdocs/societe/canvas/actions_card_common.class.php
@@ -26,7 +26,7 @@
  *	\class      ActionsCardCommon
  *	\brief      Classe permettant la gestion des tiers par defaut
  */
-class ActionsCardCommon
+abstract class ActionsCardCommon
 {
     var $db;
     var $targetmodule;