diff --git a/README.md b/README.md
index 197645f..beb2a7f 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [Official Spack documentation](https://spack.readthedocs.io/en/latest/)
 
-## How to use on Merlin systems (Merlin6/Merlin7)
+## How to use on Merlin systems (Merlin6/Merlin7/Ra)
 
 Load the spack module