diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index e938128..0815642 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -2215,6 +2215,18 @@ function system_update_8032() {
 }
 
 /**
+ * coverts the css_gzip_compression, js_gzip_compression variables to Config API.
+ *
+ * @ingroup config_upgrade
+ */
+function system_update_8033() {
+  $variable_map = array(
+    'css_gzip_compression' => 'gzip_compression.css',
+    'js_gzip_compression' => 'gzip_compression.js'
+  );
+  update_variables_to_config('system.performance', $variable_map)
+}
+/**
  * @} End of "defgroup updates-7.x-to-8.x".
  * The next series of updates should start at 9000.
  */