diff --git a/user_guide_src/source/helpers/cookie_helper.rst b/user_guide_src/source/helpers/cookie_helper.rst
index 2e8db5f..3b59417 100644
--- a/user_guide_src/source/helpers/cookie_helper.rst
+++ b/user_guide_src/source/helpers/cookie_helper.rst
@@ -43,7 +43,7 @@
 	``CI_Input::set_cookie()``.
 
 
-.. function:: get_cookie($index[, $xss_clean = FALSE]])
+.. function:: get_cookie($index[, $xss_clean = NULL]])
 
 	:param string $index: Cookie name
 	:param bool $xss_clean: Whether to apply XSS filtering to the returned value