diff --git a/Vagrantfile b/Vagrantfile
index 327cf7f621b233f6fcacabfcbd86c25c137a6daa..fb66bca6e42294479c8047565c2f090e403b2d1a 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -29,6 +29,14 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
       core.vm.provider :virtualbox do |vb|
         vb.memory = $vb_memory
         vb.cpus = $vb_cpus
+        # On VirtualBox, we don't have guest additions or a functional vboxsf
+        # in CoreOS, so tell Vagrant that so it can be smarter.
+        vb.check_guest_additions = false
+        vb.functional_vboxsf = false
+      end
+       # plugin conflict
+      if Vagrant.has_plugin?("vagrant-vbguest") then
+        core.vbguest.auto_update = false
       end
 
       core.vm.hostname = HOSTNAME