diff --git a/library/src/main/java/com/google/android/exoplayer2/util/SlidingPercentile.java b/library/src/main/java/com/google/android/exoplayer2/util/SlidingPercentile.java
index 8b1af1f0c8..c43b1929cb 100644
--- a/library/src/main/java/com/google/android/exoplayer2/util/SlidingPercentile.java
+++ b/library/src/main/java/com/google/android/exoplayer2/util/SlidingPercentile.java
@@ -32,7 +32,7 @@ import java.util.Comparator;
  * @see <a href="http://en.wikipedia.org/wiki/Moving_average">Wiki: Moving average</a>
  * @see <a href="http://en.wikipedia.org/wiki/Selection_algorithm">Wiki: Selection algorithm</a>
  */
-public final class SlidingPercentile {
+public class SlidingPercentile {
 
   // Orderings.
   private static final Comparator<Sample> INDEX_COMPARATOR = new Comparator<Sample>() {