diff --git a/iso/docker/entrypoint.sh b/iso/docker/entrypoint.sh
index a5a13c7..970d45b 100755
--- a/iso/docker/entrypoint.sh
+++ b/iso/docker/entrypoint.sh
@@ -772,8 +772,11 @@ update-desktop-database 2>/dev/null || true
 # Fontconfig cache
 fc-cache -f 2>/dev/null || true
 
-# Plymouth: set OrionOS as the default theme (archiso runs mkinitcpio after this)
+# Plymouth: set default theme and rebuild initramfs so the theme is baked in.
+# mkinitcpio already ran during pacstrap (kernel install) before this chroot
+# script executes, so we must rebuild here or the Arch default theme is used.
 plymouth-set-default-theme orionos 2>/dev/null || true
+mkinitcpio -P 2>&1 | tail -5 || true
 
 # xscreensaver config (screen lock)
 mkdir -p /etc/skel