diff --git a/processing/src/main/java/io/druid/query/aggregation/hyperloglog/HyperLogLogCollector.java b/processing/src/main/java/io/druid/query/aggregation/hyperloglog/HyperLogLogCollector.java
index bf32d85886c..a96b7a5c2b7 100644
--- a/processing/src/main/java/io/druid/query/aggregation/hyperloglog/HyperLogLogCollector.java
+++ b/processing/src/main/java/io/druid/query/aggregation/hyperloglog/HyperLogLogCollector.java
@@ -202,9 +202,9 @@ public abstract class HyperLogLogCollector implements Comparable<HyperLogLogColl
     return buffer.remaining() != NUM_BYTES_FOR_BUCKETS;
   }
 
-  private volatile ByteBuffer storageBuffer;
-  private volatile int initPosition;
-  private volatile Double estimatedCardinality;
+  private ByteBuffer storageBuffer;
+  private int initPosition;
+  private Double estimatedCardinality;
 
   public HyperLogLogCollector(ByteBuffer byteBuffer)
   {