diff --git a/src/main/java/com/yahoo/sketches/pig/tuple/UnionDoubleSummarySketch.java b/src/main/java/com/yahoo/sketches/pig/tuple/UnionDoubleSummarySketch.java
index 8a9b06c..09206c2 100644
--- a/src/main/java/com/yahoo/sketches/pig/tuple/UnionDoubleSummarySketch.java
+++ b/src/main/java/com/yahoo/sketches/pig/tuple/UnionDoubleSummarySketch.java
@@ -9,9 +9,7 @@
 
 import com.yahoo.sketches.tuple.DoubleSummary;
 import com.yahoo.sketches.tuple.DoubleSummaryDeserializer;
-import com.yahoo.sketches.tuple.DoubleSummaryFactory;
 import com.yahoo.sketches.tuple.DoubleSummarySetOperations;
-import com.yahoo.sketches.tuple.SummarySetOperations;
 
 /**
  * This is to union Sketch<DoubleSummary>.