diff --git a/src/docs/userguide/arcanist_diff.diviner b/src/docs/userguide/arcanist_diff.diviner
index 26bd83f773..c010c1c3e6 100644
--- a/src/docs/userguide/arcanist_diff.diviner
+++ b/src/docs/userguide/arcanist_diff.diviner
@@ -45,7 +45,7 @@ been accepted, you can commit it like this:
 
   $ arc commit
 
-== Git ==
+= Git =
 
 In Git, `arc diff` sends **all commits in a range** for review. By default,
 this range is: