diff --git a/inc/inc.ClassExtensionMgr.php b/inc/inc.ClassExtensionMgr.php
index 455f480a6..08ca88d15 100644
--- a/inc/inc.ClassExtensionMgr.php
+++ b/inc/inc.ClassExtensionMgr.php
@@ -410,14 +410,19 @@ $EXT_CONF = '.var_export($EXT_CONF, true).';');
 	} /* }}} */
 
 	/**
-	 * Check content of extension directory or configuration of extension
+	 * Check configuration of extension
 	 *
-	 * @param string|array $dir full path to extension directory or extension name
-	 * or an array containing the configuration.
-	 * @param array $options array with options elements 'noconstraints' and 'nofiles'.
-	 * Set 'noconstraints' to true if
-	 * constraints to local seeddms installation shall not be checked. Set 'nofiles'
-	 * to true to turn off checking of files
+	 * This method checks if the configurations of an extension is complete
+	 * and all dependencies specified in the configuration are met.
+	 *
+	 * @param string $extname not used anymore. Was previously use to store
+	 *   result of the check into $this->configcache, but this method can be
+	 *   used for installed extensions and those in the repository, which makes
+	 *   the use of a cache useless.
+	 * @param array $extconf extension configuration to be checked
+	 * @param array $options array with option element 'noconstraints'.
+	 *   Set 'noconstraints' to true if constraints to local seeddms
+	 *   installation shall not be checked.
 	 * @return boolean true if check was successful, otherwise false
 	 */
 	public function checkExtensionByName($extname, $extconf, $options=array()) { /* {{{ */