diff --git a/bundle/bundle.go b/bundle/bundle.go
index 18cbba72..b3ef917d 100644
--- a/bundle/bundle.go
+++ b/bundle/bundle.go
@@ -48,7 +48,10 @@ type Bundle struct {
 	// Exclusively use this field for filesystem operations.
 	SyncRoot vfs.Path
 
-	// Path to the root of git worktree
+	// Path to the root of git worktree containing the bundle.
+	// This is the same as git repository root if worktrees are not used,
+	// otherwise it's a descedant of git repository root.
+	// https://git-scm.com/docs/git-worktree
 	WorktreeRoot vfs.Path
 
 	// Config contains the bundle configuration.