diff --git a/src/main/java/fucoin/wallet/WalletImpl.java b/src/main/java/fucoin/wallet/WalletImpl.java
index a61b5ed86d8a2eba0e54157c02fc781e5093ae6c..62a4ba47998acea8255d3dd1d438b614f008adc4 100644
--- a/src/main/java/fucoin/wallet/WalletImpl.java
+++ b/src/main/java/fucoin/wallet/WalletImpl.java
@@ -30,7 +30,8 @@ public class WalletImpl extends AbstractWallet {
     private transient WalletGuiControl gui;
     private String preKnownNeighbourName;
     private boolean isActive;
-	private AggregationContext aggregationContext = new AggregationContextBuilder(null, null, null, null, null).build();
+	private AggregationContext aggregationContext = new AggregationContextBuilder(null, null, null, new double[] { -1 },
+			x -> x[0]).build();
 	private boolean hasPendingAggregationRequest = false;
     private ConcurrentLinkedQueue<ActorRef> deferedSupervisorReceivers = new ConcurrentLinkedQueue<>();
 	private transient final EvictingQueue<UUID> handledAggregationRequests = EvictingQueue.create(10);