diff --git a/core/modules/field/lib/Drupal/field/Plugin/Core/Entity/Field.php b/core/modules/field/lib/Drupal/field/Plugin/Core/Entity/Field.php
index 6199e3e..262781c 100644
--- a/core/modules/field/lib/Drupal/field/Plugin/Core/Entity/Field.php
+++ b/core/modules/field/lib/Drupal/field/Plugin/Core/Entity/Field.php
@@ -446,7 +446,7 @@ public function getSchema() {
       $schema += array('columns' => array(), 'indexes' => array(), 'foreign keys' => array());
 
       // Check that the schema does not include forbidden column names.
-      if (array_intersect(array_keys($schema['columns']), $this->field_reserved_columns())) {
+      if (array_intersect(array_keys($schema['columns']), static::getReservedColumns())) {
         throw new FieldException('Illegal field type columns.');
       }
 
@@ -568,7 +568,7 @@ public function unserialize($serialized) {
    *
    * @return array
    */
-  public static function field_reserved_columns() {
+  public static function getReservedColumns() {
     return array('deleted');
   }
 
diff --git a/core/modules/field_sql_storage/field_sql_storage.module b/core/modules/field_sql_storage/field_sql_storage.module
index d2dd30d..dcbe476 100644
--- a/core/modules/field_sql_storage/field_sql_storage.module
+++ b/core/modules/field_sql_storage/field_sql_storage.module
@@ -94,7 +94,7 @@ function _field_sql_storage_revision_tablename($field) {
  *   unique among all other fields.
  */
 function _field_sql_storage_columnname($name, $column) {
-  return in_array($column, Field::field_reserved_columns()) ? $column : $name . '_' . $column;
+  return in_array($column, Field::getReservedColumns()) ? $column : $name . '_' . $column;
 }
 
 /**
diff --git a/core/modules/field_sql_storage/lib/Drupal/field_sql_storage/Entity/Tables.php b/core/modules/field_sql_storage/lib/Drupal/field_sql_storage/Entity/Tables.php
index 12fd42e..11aebc0 100644
--- a/core/modules/field_sql_storage/lib/Drupal/field_sql_storage/Entity/Tables.php
+++ b/core/modules/field_sql_storage/lib/Drupal/field_sql_storage/Entity/Tables.php
@@ -119,7 +119,7 @@ function addField($field, $type, $langcode) {
         if ($key < $count) {
           $next = $specifiers[$key + 1];
           // Is this a field column?
-          if (isset($field['columns'][$next]) || in_array($next, Field::field_reserved_columns())) {
+          if (isset($field['columns'][$next]) || in_array($next, Field::getReservedColumns())) {
             // Use it.
             $column = $next;
             // Do not process it again.