diff --git a/core/modules/system/config/system.performance.yml b/core/modules/system/config/system.performance.yml
index d508591..80f349a 100644
--- a/core/modules/system/config/system.performance.yml
+++ b/core/modules/system/config/system.performance.yml
@@ -1,6 +1,6 @@
 cache:
   page:
-    enabled: '0'
+    use_internal: '0'
     max_age: '0'
 css:
   preprocess: '0'
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index 45ae2d0..a11d148 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -1632,7 +1632,7 @@ function system_performance_settings($form, &$form_state) {
   $form['caching']['cache'] = array(
     '#type' => 'checkbox',
     '#title' => t('Use internal page cache'),
-    '#description' => t('If a reverse proxy cache isn\'t available, use Drupal\'s internal cache system to store cached pages.'),
+    '#description' => t("If a reverse proxy cache isn't available, use Drupal's internal cache system to store cached pages."),
     '#default_value' => $config->get('cache.page.use_internal'),
   );
 
diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 96761c8..5336b6f 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -1937,7 +1937,7 @@ function system_update_8016() {
  */
 function system_update_8017() {
   update_variables_to_config('system.performance', array(
-    'cache' => 'cache.page.use.internal',
+    'cache' => 'cache.page.use_internal',
     'page_cache_maximum_age' => 'cache.page.max_age',
     'page_compression' => 'response.gzip',
     'preprocess_css' => 'css.preprocess',