modules/system/system.api.php | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/modules/system/system.api.php b/modules/system/system.api.php
index 77d2b96..2c529d4 100644
--- a/modules/system/system.api.php
+++ b/modules/system/system.api.php
@@ -707,9 +707,10 @@ function hook_element_info_alter(&$type) {
 /**
  * Perform cleanup tasks.
  *
- * This hook is run at the end of each page request. It is often used for
- * page logging and specialized cleanup. This hook MUST NOT print anything
- * because by the time it runs the response is already sent to the browser.
+ * This hook is run at the end of most regular page requests. It is often
+ * used for page logging and specialized cleanup. This hook MUST NOT print
+ * anything because by the time it runs the response is already sent to
+ * the browser.
  *
  * Only use this hook if your code must run even for cached page views.
  * If you have code which must run once on all non-cached pages, use