diff --git a/osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs b/osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs
index e16411f343..4280112967 100644
--- a/osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs
+++ b/osu.Game/Beatmaps/Formats/LegacyBeatmapEncoder.cs
@@ -112,7 +112,7 @@ namespace osu.Game.Beatmaps.Formats
             writer.WriteLine(FormattableString.Invariant($"Source: {beatmap.Metadata.Source}"));
             writer.WriteLine(FormattableString.Invariant($"Tags: {beatmap.Metadata.Tags}"));
             writer.WriteLine(FormattableString.Invariant($"BeatmapID: {beatmap.BeatmapInfo.OnlineBeatmapID ?? 0}"));
-            writer.WriteLine(FormattableString.Invariant($"BeatmapSetID: {beatmap.BeatmapInfo.BeatmapSet.OnlineBeatmapSetID ?? 0}"));
+            writer.WriteLine(FormattableString.Invariant($"BeatmapSetID: {beatmap.BeatmapInfo.BeatmapSet.OnlineBeatmapSetID ?? -1}"));
         }
 
         private void handleDifficulty(TextWriter writer)