diff --git a/crates/border-wars/src/map/ownership.rs b/crates/border-wars/src/map/ownership.rs
index 3218215..1fad8e6 100644
--- a/crates/border-wars/src/map/ownership.rs
+++ b/crates/border-wars/src/map/ownership.rs
@@ -24,6 +24,7 @@ impl Plugin for OwnershipPlugin {
 #[derive(Resource)]
 pub struct OwnershipColorContrast(pub f32);
 
+/// Init resources related to the ownership of the tiles.
 fn setup_ownership_resources(mut commands: Commands) {
     commands.insert_resource(OwnershipColorContrast(0.4));
 }