diff --git a/ws2012/P2P/uebungen/4/src/RandomGenerator.java b/ws2012/P2P/uebungen/4/src/RandomGenerator.java
index 9ef7119d..d5359173 100644
--- a/ws2012/P2P/uebungen/4/src/RandomGenerator.java
+++ b/ws2012/P2P/uebungen/4/src/RandomGenerator.java
@@ -13,7 +13,7 @@ public class RandomGenerator {
 	public static double initDeathRate = 0.20;
 	public static int initRounds = 10;
 
-	public static ArrayList<Node> nodes = new ArrayList<Node>();
+	public static List<Node> nodes = new ArrayList<Node>();
 	public static Random gen = new Random();
 
 	/**