diff --git a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/TribeCards/Characters/Inventor.java b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/TribeCards/Characters/Inventor.java
index 15df18f..5f49f59 100644
--- a/src/main/java/it/polimi/ingsw/gc14/Model/Cards/TribeCards/Characters/Inventor.java
+++ b/src/main/java/it/polimi/ingsw/gc14/Model/Cards/TribeCards/Characters/Inventor.java
@@ -129,6 +129,7 @@ public class Inventor extends Character {
      */
     @Override
     public void insert(Player player) {
+        player.buildingCards.stream().filter(b -> b.getEffectId() == 4).forEach(b4 -> b4.applyEffect(player));
         player.inventors.add(this);
     }
 }