diff --git a/src/main/java/org/bdware/sc/event/clients/ContractConsumer.java b/src/main/java/org/bdware/sc/event/clients/ContractConsumer.java
index 2d6642f..cfff548 100644
--- a/src/main/java/org/bdware/sc/event/clients/ContractConsumer.java
+++ b/src/main/java/org/bdware/sc/event/clients/ContractConsumer.java
@@ -88,7 +88,8 @@ public class ContractConsumer implements IEventConsumer {
                         try {
                             ContractResult result = JsonUtil.fromJson(str, ContractResult.class);
                             if (result.status == ContractResult.Status.Success) {
-                                rc.onResult(null);
+                                String retStr = null;
+                                rc.onResult(retStr);
                             } else if (callCount.get() == TIMEOUT_COUNT ||
                                     (result.status == ContractResult.Status.Exception &&
                                             result.result.toString().contains("not exported"))) {