diff --git a/src/main/java/com/alibaba/druid/pool/vendor/MSSQLValidConnectionChecker.java b/src/main/java/com/alibaba/druid/pool/vendor/MSSQLValidConnectionChecker.java
index 7aae11f953..70a20849ae 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/MSSQLValidConnectionChecker.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/MSSQLValidConnectionChecker.java
@@ -15,12 +15,11 @@ import com.alibaba.druid.util.JdbcUtils;
  */
 public class MSSQLValidConnectionChecker implements ValidConnectionChecker, Serializable {
 
+    private static final long   serialVersionUID = 1L;
+
     private static final String QUERY            = "SELECT x";
     private static final Log    LOG              = LogFactory.getLog(MSSQLValidConnectionChecker.class);
 
-    /** The serialVersionUID */
-    private static final long   serialVersionUID = 3995516551833725723L;
-
     public boolean isValidConnection(final Connection c) {
         Statement stmt = null;