diff --git a/certificationauthority.php b/certificationauthority.php
index bd65ae5..5e63a1c 100644
--- a/certificationauthority.php
+++ b/certificationauthority.php
@@ -183,7 +183,8 @@ extendedKeyUsage = serverAuth, clientAuth
   }
   // }}}
 
-  /** Create a CSR
+  /** Create a CSR.
+    * Will create a private key if none is already exists
     * @param string $countryName Country name (like FR)
     * @param string $organizationName Name of organization
     * @param string $commonName Common name of authority