diff --git a/designer-chart/src/main/java/com/fr/van/chart/bubble/BubbleIndependentVanChartInterface.java b/designer-chart/src/main/java/com/fr/van/chart/bubble/BubbleIndependentVanChartInterface.java
index a00423ad7..679dfcd60 100644
--- a/designer-chart/src/main/java/com/fr/van/chart/bubble/BubbleIndependentVanChartInterface.java
+++ b/designer-chart/src/main/java/com/fr/van/chart/bubble/BubbleIndependentVanChartInterface.java
@@ -128,7 +128,7 @@ public class BubbleIndependentVanChartInterface extends AbstractIndependentVanCh
     public ChartDataPane getChartDataPane(AttributeChangeListener listener) {
         return new AbstractVanSingleDataPane(listener) {
 
-            VanChartBubblePlot plot;
+            private VanChartBubblePlot plot;
 
             @Override
             public void populate(ChartCollection collection) {
diff --git a/designer-chart/src/main/java/com/fr/van/chart/gauge/GaugeIndependentVanChartInterface.java b/designer-chart/src/main/java/com/fr/van/chart/gauge/GaugeIndependentVanChartInterface.java
index d19ea6a46..c8b2ac682 100644
--- a/designer-chart/src/main/java/com/fr/van/chart/gauge/GaugeIndependentVanChartInterface.java
+++ b/designer-chart/src/main/java/com/fr/van/chart/gauge/GaugeIndependentVanChartInterface.java
@@ -120,7 +120,7 @@ public class GaugeIndependentVanChartInterface extends AbstractIndependentVanCha
     public ChartDataPane getChartDataPane(AttributeChangeListener listener) {
         return new AbstractVanSingleDataPane(listener) {
 
-            VanChartGaugePlot gaugePlot;
+            private VanChartGaugePlot gaugePlot;
 
             @Override
             public void populate(ChartCollection collection) {