diff --git a/includes/common.inc b/includes/common.inc
index f54f29a..9b4f4db 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -6164,7 +6164,7 @@ function element_children(&$elements, $sort = FALSE) {
 }
 
 /**
- * Return the visibile children of an element.
+ * Return the visible children of an element.
  *
  * @param $elements
  *   The parent element.
diff --git a/modules/update/update.test b/modules/update/update.test
index 4fb8630..2688bb3 100644
--- a/modules/update/update.test
+++ b/modules/update/update.test
@@ -13,7 +13,7 @@
  * dummy .info file data (specified via hook_system_info_alter() in the
  * update_test helper module) describing what's currently installed.  Each
  * test case defines a set of projects to install, their current state (via
- * the 'update_test_system_info' variable) and the desired availabile update
+ * the 'update_test_system_info' variable) and the desired available update
  * data (via the 'update_test_xml_map' variable), and then performs a series
  * of assertions that the report matches our expectations given the specific
  * initial state and availability scenario.