diff --git a/src/main/java/messagerosa/core/model/XMessagePayload.java b/src/main/java/messagerosa/core/model/XMessagePayload.java
index 7d3c4e3..0798712 100644
--- a/src/main/java/messagerosa/core/model/XMessagePayload.java
+++ b/src/main/java/messagerosa/core/model/XMessagePayload.java
@@ -21,6 +21,6 @@ public class XMessagePayload {
 	private ArrayList<ButtonChoice> buttonChoices;
 	private StylingTag stylingTag;
 	private String flow;
-	private Integer index;
+	private Integer questionIndex;
 	private String mediaCaption;
 }