diff --git a/base/src/org/compiere/model/GridWindow.java b/base/src/org/compiere/model/GridWindow.java
index 78f7ff4539..e20d4faa44 100644
--- a/base/src/org/compiere/model/GridWindow.java
+++ b/base/src/org/compiere/model/GridWindow.java
@@ -279,6 +279,11 @@ public class GridWindow implements Serializable
 			return null;
 		return (GridTab)m_tabs.get(i);
 	}	//	getTab
+	
+	public int getTabIndex(GridTab tab)
+	{
+		return m_tabs.indexOf(tab);
+	}
 
 	/**
 	 *	Get Window_ID