diff --git a/docs/getting_started/user-guide.rst b/docs/getting_started/user-guide.rst
index f49f005b2..fd1323703 100644
--- a/docs/getting_started/user-guide.rst
+++ b/docs/getting_started/user-guide.rst
@@ -276,7 +276,7 @@ supports gpu":
       gpu: true
      
 Given that you are installing a module for a Singularity container, the ``--nv``
-option will be added. Currently, the following features are supported:
+option will be added IF the container_features is also set - the default is ``null``. Currently, the following features are supported:
 
 
 .. list-table:: Title