diff --git a/src/main/java/com/alibaba/druid/pool/ha/HADataSource.java b/src/main/java/com/alibaba/druid/pool/ha/HADataSource.java
index 684c79542b..1c5ba011aa 100644
--- a/src/main/java/com/alibaba/druid/pool/ha/HADataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/ha/HADataSource.java
@@ -19,8 +19,6 @@ public class HADataSource extends MultiDataSource implements DataSource {
 
     private final static Log              LOG                     = LogFactory.getLog(HADataSource.class);
 
-    private DruidDataSource               masterDataSource;
-
     protected ArrayList<DruidDataSource>  dataSources             = new ArrayList<DruidDataSource>();
     protected final List<DruidDataSource> notAvailableDatasources = new CopyOnWriteArrayList<DruidDataSource>();