diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/component/WListbox.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/component/WListbox.java
index fba2103d5b..1876a27e70 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/component/WListbox.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/component/WListbox.java
@@ -1351,6 +1351,9 @@ public class WListbox extends Listbox implements IMiniTable, TableValueChangeLis
 			if (listHead != null && layout != null) 
 			{
 				List<?> headers = listHead.getChildren();
+				if (headers.size() != layout.length)
+					return;
+				
 				int i = 0;
 				for(Object obj : headers)
 				{