diff --git a/source/v2.0/guides/git.html.haml b/source/v2.0/guides/git.html.haml
index 033e47813b..09c9195242 100644
--- a/source/v2.0/guides/git.html.haml
+++ b/source/v2.0/guides/git.html.haml
@@ -86,6 +86,9 @@ title: How to install gems from git repositories
         gem 'rugged', git: 'git://github.com/libgit2/rugged.git', submodules: true
     .bullet
       .description
+        (<b>NB</b>: These built-in shorthand git sources are deprecated and will be
+        removed in Bundler 3. Instead of these, we encourage you to use <em>Custom
+        git sources</em> in your Gemfile.)
         If you are getting your gems from a public GitHub repository,
         you can use the shorthand
       :code