diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index 4abbd40..6880d7b 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -994,6 +994,10 @@ function variable_initialize($conf = array()) {
  * collation used. To avoid problems, always use lower case for persistent
  * variable names.
  *
+ * @depreciated
+ *   The variable system is deprecated in Drupal 8 and will be removed before
+ *   release. In most cases, you should use config() or state() instead.
+ *
  * @param $name
  *   The name of the variable to return.
  * @param $default
@@ -1018,6 +1022,10 @@ function variable_get($name, $default = NULL) {
  * collation used. To avoid problems, always use lower case for persistent
  * variable names.
  *
+ * @depreciated
+ *   The variable system is deprecated in Drupal 8 and will be removed before
+ *   release. In most cases, you should use config() or state() instead.
+ *
  * @param $name
  *   The name of the variable to set.
  * @param $value
@@ -1044,6 +1052,10 @@ function variable_set($name, $value) {
  * collation used. To avoid problems, always use lower case for persistent
  * variable names.
  *
+ * @depreciated
+ *   The variable system is deprecated in Drupal 8 and will be removed before
+ *   release. In most cases, you should use config() or state() instead.
+ *
  * @param $name
  *   The name of the variable to undefine.
  *