diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 69f88a8..3bf2d70 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -399,6 +399,7 @@
       -  Changed ``_exception_handler()`` to respect php.ini *display_errors* setting.
       -  Added function :php:func:`is_https()` to check if a secure connection is used.
       -  Added function :php:func:`function_usable()` to check if a function exists and is not disabled by `Suhosin <http://www.hardened-php.net/suhosin/>`.
+      -  Removed the third (`$php_error`) from function :php:func:`log_message()`.
 
    -  :doc:`Output Library <libraries/output>` changes include:
 
diff --git a/user_guide_src/source/general/common_functions.rst b/user_guide_src/source/general/common_functions.rst
index 32e8a8b..e085ef8 100644
--- a/user_guide_src/source/general/common_functions.rst
+++ b/user_guide_src/source/general/common_functions.rst
@@ -96,11 +96,10 @@
 log_message()
 =============
 
-.. php:function:: log_message($level, $message, $php_error = FALSE)
+.. php:function:: log_message($level, $message)
 
 	:param	string	$level: Log level: 'error', 'debug' or 'info'
 	:param	string	$message: Message to log
-	:param	bool	$php_error: Whether we're logging a native PHP error message
 	:returns:	void
 
 This function is an alias for ``CI_Log::write_log()``. For more info,