diff --git a/docs/sources/examples/postgresql_service.rst b/docs/sources/examples/postgresql_service.rst
index 9e5bda5076..2df02b40c5 100644
--- a/docs/sources/examples/postgresql_service.rst
+++ b/docs/sources/examples/postgresql_service.rst
@@ -99,7 +99,7 @@ Bash prompt; you can also locate it using ``docker ps -a``.
 
 .. code-block:: bash
 
-    docker commit <container_id> <your username> postgresql
+    docker commit <container_id> <your username>/postgresql
 
 Finally, run PostgreSQL server via ``docker``.