diff --git a/website/source/docs/docker/configuration.html.md b/website/source/docs/docker/configuration.html.md
index 955c62991..9dcf4f1ea 100644
--- a/website/source/docs/docker/configuration.html.md
+++ b/website/source/docs/docker/configuration.html.md
@@ -14,14 +14,16 @@ you may set. A complete reference is shown below.
 
 ### Required
 
+One of the following settings is required when using the Docker provider:
+
   * `build_dir` (string) - The path to a directory containing a Dockerfile.
     One of this, `image` or `git_repo` is required.
 
   * `image` (string) - The image to launch, specified by the image ID or a name
     such as `ubuntu:12.04`. One of this, `git_repo` or `build_dir` is required.
-    
+
   * `git_repo` (string) - The URL of a git repository to build the image from.
-    Supports pulling specific tags, branches and revision, consult the 
+    Supports pulling specific tags, branches and revision, consult the
     [docker documenation](https://docs.docker.com/engine/reference/commandline/build/#/git-repositories)
     for more information. One of this, `image` or `build_dir` is required.