diff --git a/core/lib/Drupal/Core/Plugin/Type/EntityManager.php b/core/lib/Drupal/Core/Plugin/Type/EntityManager.php
index 0aa7b8d..c85aa00 100644
--- a/core/lib/Drupal/Core/Plugin/Type/EntityManager.php
+++ b/core/lib/Drupal/Core/Plugin/Type/EntityManager.php
@@ -160,9 +160,9 @@ protected function processDefinition(&$definition, $plugin_id) {
     // Prepare entity schema fields SQL info for
     // Drupal\Core\Entity\DatabaseStorageControllerInterface::buildQuery().
     if (isset($definition['base_table'])) {
-      $definition['schema_fields_sql']['base_table'] = drupal_schema_fields_sql($definition['base_table']);
+      $definition['schema_fields_sql']['base table'] = drupal_schema_fields_sql($definition['base_table']);
       if (isset($definition['revision_table'])) {
-        $definition['schema_fields_sql']['revision_table'] = drupal_schema_fields_sql($definition['revision_table']);
+        $definition['schema_fields_sql']['revision table'] = drupal_schema_fields_sql($definition['revision_table']);
       }
     }