diff --git a/Vagrantfile b/Vagrantfile
index 1363096a4..ccd5773f0 100644
--- a/Vagrantfile
+++ b/Vagrantfile
@@ -206,7 +206,7 @@ Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
         (0..1).each do |d|
           vb.customize ['createhd',
                         '--filename', "disk-#{i}-#{d}",
-                        '--size', '11000']
+                        '--size', '11000'] unless File.exist?("disk-#{i}-#{d}.vdi")
           # Controller names are dependent on the VM being built.
           # It is set when the base box is made in our case ubuntu/trusty64.
           # Be careful while changing the box.