diff -u b/core/modules/content_translation/content_translation.install b/core/modules/content_translation/content_translation.install
--- b/core/modules/content_translation/content_translation.install
+++ b/core/modules/content_translation/content_translation.install
@@ -33,6 +33,10 @@
 /**
- * Rebuild the routes as the content translation routes have now new names.
+ * Rebuild the routes and clear the cached entity type definitions.
+ *
+ * The content translation routes have now new names and supported entity types
+ * have new link templates.
  */
 function content_translation_update_8001() {
   \Drupal::service('router.builder')->rebuild();
+  \Drupal::service('entity_type.manager')->clearCachedDefinitions();
 }