diff --git a/Projekte/mdga/client/src/main/java/pp/mdga/client/server/MdgaServer.java b/Projekte/mdga/client/src/main/java/pp/mdga/client/server/MdgaServer.java
index a23348ee..bbcfe2c4 100644
--- a/Projekte/mdga/client/src/main/java/pp/mdga/client/server/MdgaServer.java
+++ b/Projekte/mdga/client/src/main/java/pp/mdga/client/server/MdgaServer.java
@@ -135,6 +135,7 @@ private void initializeSerializables() {
         Serializer.registerClass(UpdateReadyMessage.class);
         Serializer.registerClass(UpdateTSKMessage.class);
         Serializer.registerClass(WaitPieceMessage.class);
+        Serializer.registerClass(IncorrectRequestMessage.class);
         Serializer.registerClass(Player.class);
         Serializer.registerClass(Statistic.class);
         Serializer.registerClass(Board.class);