diff --git a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
index 07438d5f2c..d044ee8893 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
@@ -87,7 +87,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
         public override Pattern Generate()
         {
-            int lastColumn = PreviousPattern.HitObjects.First().Column;
+            int lastColumn = PreviousPattern.HitObjects.FirstOrDefault()?.Column ?? 0;
 
             if ((convertType & PatternType.Reverse) > 0 && PreviousPattern.HitObjects.Any())
             {