diff --git a/doc/source/configuration/block-storage/volume-encryption.rst b/doc/source/configuration/block-storage/volume-encryption.rst
index 1642148dd7b..6992341d730 100644
--- a/doc/source/configuration/block-storage/volume-encryption.rst
+++ b/doc/source/configuration/block-storage/volume-encryption.rst
@@ -27,7 +27,7 @@ Steps to update ``cinder-api`` servers:
 
         backend = barbican
 
-#. Restart ``cinder-api``.
+#. Restart ``cinder-api``, ``cinder-volume`` and ``cinder-backup``.
 
 Update ``nova-compute`` servers: