diff --git a/metropolis/cli/metroctl/core/install.go b/metropolis/cli/metroctl/core/install.go
index 31fe4a0..5a41fc7 100644
--- a/metropolis/cli/metroctl/core/install.go
+++ b/metropolis/cli/metroctl/core/install.go
@@ -47,7 +47,8 @@
 	if err != nil {
 		return fmt.Errorf("failed to read OS image: %w", err)
 	}
-	bootPath, err := install.EFIBootPath(osImage.Config.ProductInfo.Architecture())
+	architecture := osImage.Config.ProductInfo.Architecture()
+	bootPath, err := install.EFIBootPath(architecture)
 	if err != nil {
 		return err
 	}
@@ -88,6 +89,9 @@
 	if err != nil {
 		return fmt.Errorf("target device has invalid geometry: %w", err)
 	}
+	if architecture == "x86_64" {
+		partTable.BootCode = install.BootcodeX86
+	}
 	esp := gpt.Partition{
 		Type: gpt.PartitionTypeEFISystem,
 		Name: "MetropolisInstaller",