diff --git a/docs/interfaces/models.md b/docs/interfaces/models.md
index 2724ba1..86def14 100644
--- a/docs/interfaces/models.md
+++ b/docs/interfaces/models.md
@@ -20,7 +20,7 @@ or customize the source name and revision:
 source = Source(
     repo="https://github.com/jacebrowning/gitman-demo",
     name="my-demo", # defaults to repository name
-    rev="my-branch", # defaults to 'main'
+    rev="my-branch", # defaults to 'HEAD'
 )
 ```