diff --git a/build.sh b/build.sh
index 3530c89..2df2552 100755
--- a/build.sh
+++ b/build.sh
@@ -25,7 +25,7 @@ fi
 
 log "creating VM"
     VBoxManage createvm --name=$VM_NAME --ostype=ArchLinux_64 --register
-    VBoxManage modifyvm        $VM_NAME --cpus=4 --memory=4096 --vram=12
+    VBoxManage modifyvm        $VM_NAME --cpus=4 --memory=4096 --vram=12 --firmware=efi
     VBoxManage modifyvm        $VM_NAME --nic1=bridged --bridgeadapter1=$ETH_DEV
     VBoxManage createhd --filename=$PWD/tmp/drive.vdi --size=$((1024 * 20)) --variant=Standard
     VBoxManage storagectl      $VM_NAME       --name=SATA --add sata --bootable on