diff --git a/msg/machine.scm b/msg/machine.scm
index b874a7e..9e5c50b 100644
--- a/msg/machine.scm
+++ b/msg/machine.scm
@@ -80,7 +80,7 @@
     (system (format #f "/opt/homebrew/bin/qemu-system-aarch64 \
              -machine virt,highmem=on \
              -accel hvf \
-             -cpu host \
+             -cpu cortex-a57 \
              -smp ~a \
              -display none \
              -hda $HOME/.guix/qemu/guix-user.qcow2 \
@@ -126,7 +126,7 @@
 	  (system "/opt/homebrew/bin/qemu-system-aarch64 \
              -machine virt,highmem=on \
              -accel hvf \
-             -cpu host \
+             -cpu cortex-a57 \
              -smp 4 \
              -display none \
              -hda $HOME/.guix/qemu/guix-user.qcow2 \