diff --git a/includes/bootstrap.inc b/includes/bootstrap.inc
index 15dcb9c..9f43b92 100644
--- a/includes/bootstrap.inc
+++ b/includes/bootstrap.inc
@@ -68,32 +68,32 @@ define('WATCHDOG_EMERGENCY', 0);
 define('WATCHDOG_ALERT', 1);
 
 /**
- * Log message severity -- Critical: critical conditions.
+ * Log message severity -- Critical conditions.
  */
 define('WATCHDOG_CRITICAL', 2);
 
 /**
- * Log message severity -- Error: error conditions.
+ * Log message severity -- Error conditions.
  */
 define('WATCHDOG_ERROR', 3);
 
 /**
- * Log message severity -- Warning: warning conditions.
+ * Log message severity -- Warning conditions.
  */
 define('WATCHDOG_WARNING', 4);
 
 /**
- * Log message severity -- Notice: normal but significant condition.
+ * Log message severity -- Normal but significant conditions.
  */
 define('WATCHDOG_NOTICE', 5);
 
 /**
- * Log message severity -- Informational: informational messages.
+ * Log message severity -- Informational messages.
  */
 define('WATCHDOG_INFO', 6);
 
 /**
- * Log message severity -- Debug: debug-level messages.
+ * Log message severity -- Debug-level messages.
  */
 define('WATCHDOG_DEBUG', 7);
 
@@ -1691,8 +1691,16 @@ function watchdog_exception($type, Exception $exception, $message = NULL, $varia
  *   NULL if message is already translated or not possible to
  *   translate.
  * @param $severity
- *   The severity of the message, as per RFC 3164. Possible values are
- *   WATCHDOG_ERROR, WATCHDOG_WARNING, etc.
+ *   The severity of the message; one of the following values as defined in
+ *   @link http://www.faqs.org/rfcs/rfc3164.html RFC 3164: @endlink
+ *   - WATCHDOG_EMERGENCY: Emergency, system is unusable.
+ *   - WATCHDOG_ALERT: Alert, action must be taken immediately.
+ *   - WATCHDOG_CRITICAL: Critical conditions.
+ *   - WATCHDOG_ERROR: Error conditions.
+ *   - WATCHDOG_WARNING: Warning conditions.
+ *   - WATCHDOG_NOTICE: (default) Normal but significant conditions.
+ *   - WATCHDOG_INFO: Informational messages.
+ *   - WATCHDOG_DEBUG: Debug-level messages.
  * @param $link
  *   A link to associate with the message.
  *
diff --git a/modules/system/system.api.php b/modules/system/system.api.php
index d739fc9..e283869 100644
--- a/modules/system/system.api.php
+++ b/modules/system/system.api.php
@@ -2333,31 +2333,40 @@ function hook_xmlrpc_alter(&$methods) {
 }
 
 /**
- * Log an event message
+ * Log an event message.
  *
  * This hook allows modules to route log events to custom destinations, such as
  * SMS, Email, pager, syslog, ...etc.
  *
  * @param $log_entry
  *   An associative array containing the following keys:
- *   - type: The type of message for this entry. For contributed modules, this is
- *     normally the module name. Do not use 'debug', use severity WATCHDOG_DEBUG instead.
- *   - user: The user object for the user who was logged in when the event happened.
- *   - request_uri: The Request URI for the page the event happened in.
- *   - referer: The page that referred the use to the page where the event occurred.
+ *   - type: The type of message for this entry.
+ *   - user: The user object for the user who was logged in when the event
+ *     happened.
+ *   - request_uri: The request URI for the page the event happened in.
+ *   - referer: The page that referred the user to the page where the event
+ *     occurred.
  *   - ip: The IP address where the request for the page came from.
- *   - timestamp: The UNIX timestamp of the date/time the event occurred
- *   - severity: One of the following values as defined in RFC 3164 http://www.faqs.org/rfcs/rfc3164.html
- *     WATCHDOG_EMERGENCY Emergency: system is unusable
- *     WATCHDOG_ALERT     Alert: action must be taken immediately
- *     WATCHDOG_CRITICAL  Critical: critical conditions
- *     WATCHDOG_ERROR     Error: error conditions
- *     WATCHDOG_WARNING   Warning: warning conditions
- *     WATCHDOG_NOTICE    Notice: normal but significant condition
- *     WATCHDOG_INFO      Informational: informational messages
- *     WATCHDOG_DEBUG     Debug: debug-level messages
- *   - link: an optional link provided by the module that called the watchdog() function.
- *   - message: The text of the message to be logged.
+ *   - timestamp: The UNIX timestamp of the date/time the event occurred.
+ *   - severity: The severity of the message; one of the following values as
+ *     defined in @link http://www.faqs.org/rfcs/rfc3164.html RFC 3164: @endlink
+ *     - WATCHDOG_EMERGENCY: Emergency, system is unusable.
+ *     - WATCHDOG_ALERT: Alert, action must be taken immediately.
+ *     - WATCHDOG_CRITICAL: Critical conditions.
+ *     - WATCHDOG_ERROR: Error conditions.
+ *     - WATCHDOG_WARNING: Warning conditions.
+ *     - WATCHDOG_NOTICE: Normal but significant conditions.
+ *     - WATCHDOG_INFO: Informational messages.
+ *     - WATCHDOG_DEBUG: Debug-level messages.
+ *   - link: An optional link provided by the module that called the watchdog()
+ *     function.
+ *   - message: The text of the message to be logged. Variables in the message
+ *     are indicated by using placeholder strings alongside the variables
+ *     argument to declare the value of the placeholders. See t() for
+ *     documentation on how the message and variable parameters interact.
+ *   - variables: An array of variables to be inserted into the message on
+ *     display. Will be NULL or missing if a message is already translated or if
+ *     the message is not possible to translate.
  */
 function hook_watchdog(array $log_entry) {
   global $base_url, $language;