diff --git a/htdocs/core/db/pgsql.class.php b/htdocs/core/db/pgsql.class.php
index fe80f1ad28e..6ceb39b7080 100644
--- a/htdocs/core/db/pgsql.class.php
+++ b/htdocs/core/db/pgsql.class.php
@@ -37,20 +37,26 @@ class DoliDBPgsql extends DoliDB
 {
 	//! Database type
 	public $type = 'pgsql'; // Name of manager
+
 	//! Database label
 	const LABEL = 'PostgreSQL'; // Label of manager
+
 	//! Charset
 	public $forcecharset = 'UTF8'; // Can't be static as it may be forced with a dynamic value
+
 	//! Collate used to force collate when creating database
 	public $forcecollate = ''; // Can't be static as it may be forced with a dynamic value
+
 	//! Version min database
 	const VERSIONMIN = '9.0.0'; // Version min database
-	/** @var resource Resultset of last query */
+
+	/** @var resource|boolean Resultset of last query */
 	private $_results;
 
 	public $unescapeslashquot;
 	public $standard_conforming_strings;
 
+
 	/**
 	 *	Constructor.
 	 *	This create an opened connexion to a database server and eventually to a database