diff --git a/website/source/docs/builders/virtualbox-iso.html.markdown b/website/source/docs/builders/virtualbox-iso.html.markdown
index 51b575221..020222beb 100644
--- a/website/source/docs/builders/virtualbox-iso.html.markdown
+++ b/website/source/docs/builders/virtualbox-iso.html.markdown
@@ -283,7 +283,7 @@ The available variables are:
 Example boot command. This is actually a working boot command used to start
 an Ubuntu 12.04 installer:
 
-```
+```text
 [
   "<esc><esc><enter><wait>",
   "/install/vmlinuz noapic ",