diff --git a/common/sketch/src/main/java/org/apache/spark/util/sketch/CountMinSketch.java b/common/sketch/src/main/java/org/apache/spark/util/sketch/CountMinSketch.java
index 2c9aa93582e6fcddfd247898ecf9f60b4ad4df75..40fa20c4a3e370380ba8e047bc8a7f8dca81df9c 100644
--- a/common/sketch/src/main/java/org/apache/spark/util/sketch/CountMinSketch.java
+++ b/common/sketch/src/main/java/org/apache/spark/util/sketch/CountMinSketch.java
@@ -50,7 +50,7 @@ import java.io.OutputStream;
  *
  * This implementation is largely based on the {@code CountMinSketch} class from stream-lib.
  */
-abstract public class CountMinSketch {
+public abstract class CountMinSketch {
 
   public enum Version {
     /**