diff -Nuar --unified --recursive --text --color a/mkinitcpio-39.1/mkinitcpio b/mkinitcpio-39.1/mkinitcpio
--- a/mkinitcpio-39.1/mkinitcpio	2024-05-28 16:09:00.109483198 +1100
+++ b/mkinitcpio-39.1/mkinitcpio	2024-05-28 06:06:06.586070899 +1100
@@ -413,7 +413,7 @@
 }
 
 validate_compression() {
-    local major minor compression_fallback='zstd'
+    local major minor compression_fallback='xz'
 
     if [[ -z "$_optcompress" && -v COMPRESSION_OPTIONS && ! -v COMPRESSION ]]; then
         warning 'COMPRESSION_OPTIONS is set without also setting COMPRESSION. Configure COMPRESSION explicitly!'