diff --git a/README.rst b/README.rst
index 7f2473bbd5148c2ac15cf0420679215464aa7c29..993962655efdc07e53242512be214a6c2ddc89cc 100644
--- a/README.rst
+++ b/README.rst
@@ -161,6 +161,7 @@ The ``mpsd-software-manager`` python package.
 
   - Please check https://spack.readthedocs.io/en/latest/getting_started.html#system-prerequisites
 
+- The installation is only expected to work for x86 architectures at the moment.
 
 Requirements for particular toolchains and package sets
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~