diff --git a/core/lib/Drupal/Core/Lock/LockBackendAbstract.php b/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
index 5e54e31..315adea 100644
--- a/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
+++ b/core/lib/Drupal/Core/Lock/LockBackendAbstract.php
@@ -33,7 +33,8 @@
    */
   public function __construct() {
     // It is vital that an appropriate precision level is set so that reliable
-    // comparisons of timestamps can be made.
+    // comparisons of timestamps can be made, else the process that holds the
+    // lock and tries to re-acquire it will fail.
 
     // Ensure a precision value of at least 14.
     if (ini_get('precision') < 14) {