diff --git a/htdocs/core/modules/contract/mod_contract_magre.php b/htdocs/core/modules/contract/mod_contract_magre.php
index 7bb13f79af1..f9401344348 100644
--- a/htdocs/core/modules/contract/mod_contract_magre.php
+++ b/htdocs/core/modules/contract/mod_contract_magre.php
@@ -52,7 +52,10 @@ class mod_contract_magre extends ModelNumRefContracts
 	 * @var string name
 	 */
 	public $name='Magre';
-
+    
+	/**
+	 * @var int Automatic numbering
+	 */
 	public $code_auto=1;
 
 	/**
diff --git a/htdocs/core/modules/contract/mod_contract_olive.php b/htdocs/core/modules/contract/mod_contract_olive.php
index 405781a48ae..df45550b6c4 100644
--- a/htdocs/core/modules/contract/mod_contract_olive.php
+++ b/htdocs/core/modules/contract/mod_contract_olive.php
@@ -57,8 +57,11 @@ class mod_contract_olive extends ModelNumRefContracts
      * @var string
      */
 	public $version = 'dolibarr';    		// 'development', 'experimental', 'dolibarr'
-
-	public $code_auto = 0; 	                // Numerotation automatique
+    
+	/**
+	 * @var int Automatic numbering
+	 */
+	public $code_auto = 0; 	                
 
 
 	/**
diff --git a/htdocs/core/modules/contract/mod_contract_serpis.php b/htdocs/core/modules/contract/mod_contract_serpis.php
index 9477e79b96f..6d1f16a35a9 100644
--- a/htdocs/core/modules/contract/mod_contract_serpis.php
+++ b/htdocs/core/modules/contract/mod_contract_serpis.php
@@ -52,7 +52,10 @@ class mod_contract_serpis extends ModelNumRefContracts
 	 * @var string model name
 	 */
 	public $name='Serpis';
-
+    
+	/**
+	 * @var int Automatic numbering
+	 */
 	public $code_auto=1;