diff --git a/.gitmodules b/.gitmodules
index 4fec0c6..9880bb3 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -25,6 +25,9 @@
 [submodule "pdftotext"]
 	path = lisp/pdftotext
 	url = https://github.com/tecosaur/pdftotext.el.git
+[submodule "orgdiff"]
+	path = lisp/orgdiff
+	url = https://github.com/tecosaur/orgdiff.git
 [submodule "ob-julia"]
 	path = lisp/ob-julia
 	url = https://github.com/nico202/ob-julia.git
diff --git a/config.org b/config.org
index 1d5d1c7..9702a70 100644
--- a/config.org
+++ b/config.org
@@ -4998,6 +4998,18 @@ to make that right again, and this package makes that even easier to do.
 (use-package! org-pandoc-import
   :after org)
 #+end_src
+
+***** Document comparison
+It's quite nice to compare Org files, and the richest way to compare content is
+probably =latexdiff=. There are a few annoying steps involved here, and so I've
+written a package to streamline the process.
+
+#+begin_src emacs-lisp
+(package! orgdiff :recipe (:local-repo "lisp/orgdiff"))
+#+end_src
+
+#+begin_src emacs-lisp :tangle yes
+(use-package! orgdiff :defer t)
 #+end_src
 *** Behaviour
 [[xkcd:1319]]
diff --git a/lisp/orgdiff b/lisp/orgdiff
new file mode 160000
index 0000000..4512f8a
--- /dev/null
+++ b/lisp/orgdiff
@@ -0,0 +1 @@
+Subproject commit 4512f8aa0fd15ab27a447217c020f8c7644097f3