diff --git a/eb_hooks.py b/eb_hooks.py
index e84ce938..c0b30eec 100644
--- a/eb_hooks.py
+++ b/eb_hooks.py
@@ -1690,6 +1690,7 @@ def set_maximum(parallel, max_value):
     # software-specific limits
     'libxc': {
         '*': (divide_by_factor, 2),
+        CPU_TARGET_A64FX: (set_maximum, 12),
     },
     'MBX': {
         '*': (divide_by_factor, 2),