diff --git a/library/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java b/library/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java
index 33c78de7c7..a35f0a2b2b 100644
--- a/library/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java
+++ b/library/src/main/java/com/google/android/exoplayer2/source/dash/DashMediaSource.java
@@ -277,7 +277,7 @@ public final class DashMediaSource implements MediaPeriod, MediaSource,
       manifestUri = manifest.location;
     }
     if (!prepared) {
-      durationUs = manifest.dynamic ? C.UNSET_TIME_US : manifest.duration * 1000;
+      durationUs = manifest.dynamic ? C.UNSET_TIME_US : manifest.getPeriodDuration(0) * 1000;
       buildTrackGroups(manifest);
       if (manifest.utcTiming != null) {
         resolveUtcTimingElement(manifest.utcTiming);