diff --git a/api/src/com/cloud/agent/api/ClusterSyncAnswer.java b/api/src/com/cloud/agent/api/ClusterSyncAnswer.java
index c39927668da..927f857e5db 100644
--- a/api/src/com/cloud/agent/api/ClusterSyncAnswer.java
+++ b/api/src/com/cloud/agent/api/ClusterSyncAnswer.java
@@ -31,6 +31,8 @@ public class ClusterSyncAnswer extends Answer {
     public static final int FULL_SYNC=0;
     public static final int DELTA_SYNC=1;
     
+    public ClusterSyncAnswer() {
+    }
     
     public ClusterSyncAnswer(long clusterId, HashMap<String, Pair<String, State>> newStates, int type){
         _clusterId = clusterId;
diff --git a/api/src/com/cloud/agent/api/ClusterSyncCommand.java b/api/src/com/cloud/agent/api/ClusterSyncCommand.java
index 17b66d1a9e4..9a6b009cc0a 100644
--- a/api/src/com/cloud/agent/api/ClusterSyncCommand.java
+++ b/api/src/com/cloud/agent/api/ClusterSyncCommand.java
@@ -28,6 +28,8 @@ public class ClusterSyncCommand extends Command implements CronCommand {
 
     long _clusterId;
     
+    public ClusterSyncCommand() {
+    }
     
     public ClusterSyncCommand(int interval, int skipSteps, long clusterId){
         _interval = interval;