diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/timetracker/TimeTrackedTableWithLeftPane.java b/ganttzk/src/main/java/org/zkoss/ganttz/timetracker/TimeTrackedTableWithLeftPane.java
index 832cd8c72..1d973ba4b 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/timetracker/TimeTrackedTableWithLeftPane.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/timetracker/TimeTrackedTableWithLeftPane.java
@@ -129,7 +129,7 @@ public class TimeTrackedTableWithLeftPane<A, B> extends Div {
         return timeTrackedTable;
     }
 
-    public TimeTrackedTable getRightPane() {
+    public TimeTrackedTable<B> getRightPane() {
         return timeTrackedTable;
     }