diff --git a/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadService.java b/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadService.java
index 7593d8083c..84e712c269 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadService.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadService.java
@@ -145,6 +145,8 @@ public abstract class DownloadService extends Service {
         requirementsWatcher =
             new RequirementsWatcher(getApplicationContext(), listener, requirements);
         requirementsWatcher.start();
+      } else {
+        downloadManager.startDownloads();
       }
     }
   }