diff --git a/eb_hooks.py b/eb_hooks.py
index fc26f88b..afc00fad 100644
--- a/eb_hooks.py
+++ b/eb_hooks.py
@@ -2638,6 +2638,13 @@ def set_maximum(parallel, max_value):
     'hipBLASLt': {
         '*': (set_maximum, 8),
     },
+    'Highway': {
+        # compiling the Highway tests runs out of memory on aarch64/generic,
+        # see https://github.com/EESSI/software-layer/pull/1692;
+        # keep the A64FX default, since a '*' entry here would override it
+        '*': (divide_by_factor, 2),
+        CPU_TARGET_A64FX: (divide_by_factor, 4),
+    },
     'libxc': {
         '*': (divide_by_factor, 2),
         CPU_TARGET_A64FX: (set_maximum, 6),