diff --git a/cache/classes/helper.php b/cache/classes/helper.php
index 1f0aeddee81..e1c0ba7aeba 100644
--- a/cache/classes/helper.php
+++ b/cache/classes/helper.php
@@ -496,9 +496,9 @@ class cache_helper {
      */
     public static function update_definitions($coreonly = false) {
         global $CFG;
-        // Include locallib
+        // Include locallib.
         require_once($CFG->dirroot.'/cache/locallib.php');
-        // First update definitions
+        // First update definitions.
         cache_config_writer::update_definitions($coreonly);
         // Second reset anything we have already initialised to ensure we're all up to date.
         cache_factory::reset();
@@ -511,7 +511,7 @@ class cache_helper {
      */
     public static function update_site_identifier($siteidentifier) {
         global $CFG;
-        // Include locallib
+        // Include locallib.
         require_once($CFG->dirroot.'/cache/locallib.php');
         $factory = cache_factory::instance();
         $factory->updating_started();
@@ -544,4 +544,4 @@ class cache_helper {
         global $CFG;
         return (string)$CFG->version;
     }
-}
\ No newline at end of file
+}
diff --git a/cache/locallib.php b/cache/locallib.php
index acfdcd82a20..3a28bd40d8c 100644
--- a/cache/locallib.php
+++ b/cache/locallib.php
@@ -119,7 +119,7 @@ class cache_config_writer extends cache_config {
      */
     protected function generate_configuration_array() {
         $configuration = array();
-        $configuration['siteidentifier'] = $this->siteidentifier;;
+        $configuration['siteidentifier'] = $this->siteidentifier;
         $configuration['stores'] = $this->configstores;
         $configuration['modemappings'] = $this->configmodemappings;
         $configuration['definitions'] = $this->configdefinitions;
@@ -1008,4 +1008,4 @@ abstract class cache_administration_helper extends cache_helper {
         }
         return $locks;
     }
-}
\ No newline at end of file
+}