diff --git a/modules/system/system.admin.inc b/modules/system/system.admin.inc
index c48928041ecbb03d613cf39b32cf566f88e52cc7..8db57c8244c9185b85a5ca48b1f637c3a6fd221f 100644
--- a/modules/system/system.admin.inc
+++ b/modules/system/system.admin.inc
@@ -1774,7 +1774,7 @@ function system_sql() {
   $output .= '<h2>'. t('Query performance') .'</h2>';
   $output .= _system_sql($data, array(
    'Select_full_join' => t('The number of joins without an index; should be zero.'),
-   'Select_range_check' => t('The number of joins without an index; should be zero.'),
+   'Select_range_check' => t('The number of joins without keys that check for key usage after each row; should be zero.'),
    'Sort_scan' => t('The number of sorts done without using an index; should be zero.'),
    'Table_locks_immediate' => t('The number of times a lock could be acquired immediately.'),
    'Table_locks_waited' => t('The number of times the server had to wait for a lock.')