diff --git a/repos/gems/run/sculpt_test.run b/repos/gems/run/sculpt_test.run
index b3e3268516..d8b964378e 100644
--- a/repos/gems/run/sculpt_test.run
+++ b/repos/gems/run/sculpt_test.run
@@ -15,6 +15,8 @@ if {![file exists bin/sculpt-ahci.raw]} {
 append qemu_args " -device ahci,id=ahci "
 append qemu_args " -drive id=hdd,file=$disk_image,format=raw,if=none -device ide-hd,drive=hdd,bus=ahci.1 "
 
+append_if [have_include image/iso] qemu_args " -boot d "
+
 # attach small NVMe disk to Qemu to experiment with file-system access
 if {$use_nvme} {
 	set disk_image "bin/sculpt-nvme.raw"