diff --git a/core/modules/taxonomy/taxonomy.install b/core/modules/taxonomy/taxonomy.install
index efe43ee..ba81052 100644
--- a/core/modules/taxonomy/taxonomy.install
+++ b/core/modules/taxonomy/taxonomy.install
@@ -10,8 +10,9 @@
  */
 function taxonomy_uninstall() {
   // Remove variables.
-  config()->delete('taxonomy_override_selector');
-  config()->delete('taxonomy_terms_per_page_admin');
+  $config = config('taxonomy');
+  $config->delete('taxonomy_override_selector');
+  $config->delete('taxonomy_terms_per_page_admin');
   // Remove taxonomy_term bundles.
   $vocabularies = db_query("SELECT machine_name FROM {taxonomy_vocabulary}")->fetchCol();
   foreach ($vocabularies as $vocabulary) {