diff --git a/config/surf_snellius.py b/config/surf_snellius.py
index 66f8eed9..3c0910af 100644
--- a/config/surf_snellius.py
+++ b/config/surf_snellius.py
@@ -64,6 +64,8 @@
                     'name': 'genoa',
                     'scheduler': 'slurm',
                     'prepare_cmds': [
+                        # EESSI init script (for now) falls back to zen3, since the zen4 is incomplete
+                        # But, we want to really test the zen4 branch on these nodes
                         'export EESSI_SOFTWARE_SUBDIR_OVERRIDE=x86_64/amd/zen4',
                         common_eessi_init()
                     ],