diff --git a/game1_output.txt b/game1_output.txt
index 73cf9cc..3a0f466 100644
--- a/game1_output.txt
+++ b/game1_output.txt
@@ -111,4 +111,4 @@ OK
 axe
 axe
 fireplace
-OK
+win
diff --git a/game2_output.txt b/game2_output.txt
index b6acd5c..bfc6500 100644
--- a/game2_output.txt
+++ b/game2_output.txt
@@ -74,7 +74,7 @@ shack
 fireplace
 club
 axe
-OK
+win
 Error, can not get buildings: game not started
 Error, can not get resources: game not started
 Error, can not get buildable items: game not started
diff --git a/src/edu/kit/informatik/model/CardGame.java b/src/edu/kit/informatik/model/CardGame.java
index 0bfa414..7de1abc 100644
--- a/src/edu/kit/informatik/model/CardGame.java
+++ b/src/edu/kit/informatik/model/CardGame.java
@@ -120,7 +120,7 @@ public class CardGame {
         }
     }
 
-    public boolean build(Item item) throws InvalidInputException {
+    public String build(Item item) throws InvalidInputException {
         if (item == null) {
             throw new InvalidInputException("can not build item");
         } else if (item.requiresFireplace() && !items.contains(FIREPLACE)) {
@@ -136,6 +136,7 @@ public class CardGame {
             if (item.equals(STEAMBOAT) || item.equals(BALLOON)) {
                 // player won
                 win();
+                return "win";
             } else if (item.equals(SAILING_RAFT) || item.equals(HANG_GLIDER)) {
                 // need at least a 4/d6
                 fightingAnimal = false;
@@ -145,9 +146,9 @@ public class CardGame {
             if (currentCardStack != null && currentCardStack.isEmpty() && getBuildableItems().isEmpty()) {
                 currentCardStack = null; // game over
             }
-            return true;
+            return "OK";
         } else {
-            return false;
+            return null;
         }
     }
 
diff --git a/src/edu/kit/informatik/ui/command/Build.java b/src/edu/kit/informatik/ui/command/Build.java
index b0816d9..5aec171 100644
--- a/src/edu/kit/informatik/ui/command/Build.java
+++ b/src/edu/kit/informatik/ui/command/Build.java
@@ -21,10 +21,11 @@ public final class Build extends Command {
 
     @Override
     public void apply(CardGame game) throws InvalidInputException {
-        if (game.build(item)) {
-            Terminal.printLine("OK");
-        } else {
+        final String result = game.build(item);
+        if (result == null) {
             Terminal.printError("could not build item");
+        } else {
+            Terminal.printLine(result);
         }
     }