diff --git a/config-dist.php b/config-dist.php
index ef9d564455c..36d04cf11db 100644
--- a/config-dist.php
+++ b/config-dist.php
@@ -242,7 +242,7 @@ $CFG->admin = 'admin';
 //      $CFG->session_memcached_save_path = '127.0.0.1:11211';
 //      $CFG->session_memcached_prefix = 'memc.sess.key.';
 //      $CFG->session_memcached_acquire_lock_timeout = 120;
-//      $CFG->session_memcached_lock_expire = 7200;       // Ignored if memcached extension <= 2.1.0
+//      $CFG->session_memcached_lock_expire = 7200;       // Ignored if PECL memcached is below version 2.2.0
 //
 //   Memcache session handler (requires memcached server and memcache extension):
 //      $CFG->session_handler_class = '\core\session\memcache';
diff --git a/lib/classes/session/memcached.php b/lib/classes/session/memcached.php
index 6efc2b3f1de..3682dd796d8 100644
--- a/lib/classes/session/memcached.php
+++ b/lib/classes/session/memcached.php
@@ -44,7 +44,7 @@ class memcached extends handler {
     protected $acquiretimeout = 120;
     /**
      * @var int $lockexpire how long to wait before expiring the lock so that other requests
-     * may continue execution, ignored if memcached <= 2.1.0.
+     * may continue execution, ignored if PECL memcached is below version 2.2.0.
      */
     protected $lockexpire = 7200;
 
@@ -86,7 +86,7 @@ class memcached extends handler {
      * @return bool success
      */
     public function start() {
-        // NOTE: memcached <= 2.1.0 expires session locks automatically after max_execution_time,
+        // NOTE: memcached before 2.2.0 expires session locks automatically after max_execution_time,
         //       this leads to major difference compared to other session drivers that timeout
         //       and stop the second request execution instead.
 
@@ -119,7 +119,7 @@ class memcached extends handler {
         ini_set('memcached.sess_prefix', $this->prefix);
         ini_set('memcached.sess_locking', '1'); // Locking is required!
 
-        // Try to configure lock and expire timeouts - ignored if memcached <=2.1.0.
+        // Try to configure lock and expire timeouts - ignored if memcached is before version 2.2.0.
         ini_set('memcached.sess_lock_max_wait', $this->acquiretimeout);
         ini_set('memcached.sess_lock_expire', $this->lockexpire);
     }