diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/GanttPanel.java b/ganttzk/src/main/java/org/zkoss/ganttz/GanttPanel.java
index a8cc93d16..2bc35c261 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/GanttPanel.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/GanttPanel.java
@@ -52,6 +52,9 @@ public class GanttPanel extends XulElement implements AfterCompose {
         this.planner = planner;
         FunctionalityExposedForExtensions<?> context = (FunctionalityExposedForExtensions<?>) planner
                 .getContext();
+        if (planner.isShowingCriticalPath()) {
+            context.showCriticalPath();
+        }
         this.diagramGraph = context.getDiagramGraph();
         timeTrackerComponent = timeTrackerForGanttPanel(context
                 .getTimeTracker());
diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/Planner.java b/ganttzk/src/main/java/org/zkoss/ganttz/Planner.java
index 628277ad6..f6746ad11 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/Planner.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/Planner.java
@@ -665,6 +665,10 @@ public class Planner extends HtmlMacroComponent  {
                 .getPostChangeListeners());
     }
 
+    public boolean isShowingCriticalPath() {
+        return isShowingCriticalPath;
+    }
+
     public boolean isShowingLabels() {
         return isShowingLabels;
     }