diff --git a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashUtil.java b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashUtil.java
index 83cb10b99c..59fbfb18fe 100644
--- a/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashUtil.java
+++ b/library/dash/src/main/java/com/google/android/exoplayer2/source/dash/DashUtil.java
@@ -111,7 +111,8 @@ public final class DashUtil {
    *
    * @param dataSource The source from which the data should be loaded.
    * @param representation The representation which initialization chunk belongs to.
-   * @return {@link ChunkIndex} of the given representation.
+   * @return The {@link ChunkIndex} of the given representation, or null if no initialization or
+   *     index data exists.
    * @throws IOException Thrown when there is an error while loading.
    * @throws InterruptedException Thrown if the thread was interrupted.
    */