diff --git a/java/src/main/java/com/genexus/webpanels/GXWebPanel.java b/java/src/main/java/com/genexus/webpanels/GXWebPanel.java
index b318081ab..82aac6b95 100644
--- a/java/src/main/java/com/genexus/webpanels/GXWebPanel.java
+++ b/java/src/main/java/com/genexus/webpanels/GXWebPanel.java
@@ -638,7 +638,7 @@ private void addParmsMetadata(JSONObject inputParm, JSONArray ParmsList, HashSet
 			String key = "";
 			if (inputParm.has("av") && inputParm.has("ctrl") && inputParm.has("prop"))
 			{
-				key = inputParm.has("av") + inputParm.getString("ctrl") + inputParm.getString("prop");
+				key = inputParm.getString("av") + inputParm.getString("ctrl") + inputParm.getString("prop");
 			}
 			else if (inputParm.has("av"))
 			{