diff --git a/solutions/src/main/java/pr2/streams/reduce_critics/MapReduceGames.java b/solutions/src/main/java/pr2/streams/reduce_critics/MapReduceGames.java
index 265191b..4173c8f 100644
--- a/solutions/src/main/java/pr2/streams/reduce_critics/MapReduceGames.java
+++ b/solutions/src/main/java/pr2/streams/reduce_critics/MapReduceGames.java
@@ -30,7 +30,7 @@ public class MapReduceGames {
         // Abweichung als arithmetisches Mittel
         stream = games.stream();
         double mittelwert = stream.map(
-                        g -> g.getMetaScore() - g.getUserScore())
+                        g -> Math.abs(g.getMetaScore() - g.getUserScore()))
                 .reduce(0, (sum, value) -> sum + value);
         mittelwert /= games.size();