diff --git a/core/lib/Drupal/Core/Lock/LockBackendAbstract.php b/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
index d44ac1a..5e54e31 100644
--- a/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
+++ b/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
@@ -32,7 +32,10 @@
    * Constructs a new lock backend.
    */
   public function __construct() {
-    // Locks require a precision of at least 14.
+    // It is vital that an appropriate precision level is set so that reliable
+    // comparisons of timestamps can be made.
+
+    // Ensure a precision value of at least 14.
     if (ini_get('precision') < 14) {
       ini_set('precision', 14);
     }