diff --git a/library/hls/src/main/java/com/google/android/exoplayer2/source/hls/playlist/HlsPlaylistTracker.java b/library/hls/src/main/java/com/google/android/exoplayer2/source/hls/playlist/HlsPlaylistTracker.java
index 3d8d4eb3af..63498989c7 100644
--- a/library/hls/src/main/java/com/google/android/exoplayer2/source/hls/playlist/HlsPlaylistTracker.java
+++ b/library/hls/src/main/java/com/google/android/exoplayer2/source/hls/playlist/HlsPlaylistTracker.java
@@ -352,7 +352,7 @@ public final class HlsPlaylistTracker implements Loader.Callback<ParsingLoadable
     }
     MediaPlaylistBundle currentPrimaryBundle = playlistBundles.get(primaryHlsUrl);
     long primarySnapshotAccessAgeMs =
-        currentPrimaryBundle.lastSnapshotAccessTimeMs - SystemClock.elapsedRealtime();
+        SystemClock.elapsedRealtime() - currentPrimaryBundle.lastSnapshotAccessTimeMs;
     if (primarySnapshotAccessAgeMs > PRIMARY_URL_KEEPALIVE_MS) {
       primaryHlsUrl = url;
       playlistBundles.get(primaryHlsUrl).loadPlaylist();