diff --git a/src/usbinstall.sh b/src/usbinstall.sh
index 6f27e90..6a3ea3a 100644
--- a/src/usbinstall.sh
+++ b/src/usbinstall.sh
@@ -377,7 +377,14 @@ fi
 set_pbar 85
 
 cp -a $MOUNTDIR_EFI/EFI $MOUNTDIR_EFI_MAC
-hfs-bless $MOUNTDIR_EFI_MAC/EFI/BOOT/bootia32.efi
+TARGET_ARCH=`cat $MOUNTDIR/etc/openmamba-release | sed "s|.*for \(.*\) .*|\1|"`
+[ "$TARGET_ARCH" ] || ARCH=i586
+
+if [ "$TARGET_ARCH" = "x86_64" ]; then
+   hfs-bless $MOUNTDIR_EFI_MAC/EFI/BOOT/bootia32.efi
+else
+   hfs-bless $MOUNTDIR_EFI_MAC/EFI/BOOT/bootx64.efi
+fi
 
 set_status $"Writing bootloader..."
 echo $"Writing bootloader..."