diff --git a/src/model/resource/House.ts b/src/model/resource/House.ts
index 84995dc..eb65f09 100644
--- a/src/model/resource/House.ts
+++ b/src/model/resource/House.ts
@@ -9,6 +9,7 @@ class House extends Infrastructure {
   }
 
   public max (state: GameState): number {
+    // two houses per compound
     return state.getResource('cmpnd').value * 2;
   }