diff --git a/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs b/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs
index 9b88a8c96c..262f1c67ed 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs
@@ -95,7 +95,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
         /// <returns>The hit objects generated.</returns>
         private IEnumerable<ManiaHitObject> generateSpecific(HitObject original)
         {
-            var generator = new SpecificBeatmapPatternGenerator(random, original, beatmap, lastPattern) { AvailableColumns = availableColumns };
+            var generator = new SpecificBeatmapPatternGenerator(random, original, beatmap, availableColumns, lastPattern);
 
             Pattern newPattern = generator.Generate();
             lastPattern = newPattern;
@@ -119,14 +119,14 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
             Patterns.PatternGenerator conversion = null;
 
             if (distanceData != null)
-                conversion = new DistanceObjectPatternGenerator(random, original, beatmap, lastPattern);
+                conversion = new DistanceObjectPatternGenerator(random, original, beatmap, availableColumns, lastPattern);
             else if (endTimeData != null)
-                conversion = new EndTimeObjectPatternGenerator(random, original, beatmap);
+                conversion = new EndTimeObjectPatternGenerator(random, original, beatmap, availableColumns);
             else if (positionData != null)
             {
                 computeDensity(original.StartTime);
 
-                conversion = new HitObjectPatternGenerator(random, original, beatmap, lastPattern, lastTime, lastPosition, density, lastStair);
+                conversion = new HitObjectPatternGenerator(random, original, beatmap, availableColumns, lastPattern, lastTime, lastPosition, density, lastStair);
 
                 recordNote(original.StartTime, positionData.Position);
             }
@@ -134,8 +134,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
             if (conversion == null)
                 return null;
 
-            conversion.AvailableColumns = availableColumns;
-
             Pattern newPattern = conversion.Generate();
             lastPattern = newPattern;
 
@@ -150,8 +148,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
         /// </summary>
         private class SpecificBeatmapPatternGenerator : Patterns.Legacy.PatternGenerator
         {
-            public SpecificBeatmapPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, Pattern previousPattern)
-                : base(random, hitObject, beatmap, previousPattern)
+            public SpecificBeatmapPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, int availableColumns, Pattern previousPattern)
+                : base(random, hitObject, beatmap, availableColumns, previousPattern)
             {
             }
 
diff --git a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs
index c03a8438ae..20966a75f7 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs
@@ -29,8 +29,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
         private PatternType convertType;
 
-        public DistanceObjectPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, Pattern previousPattern)
-            : base(random, hitObject, beatmap, previousPattern)
+        public DistanceObjectPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, int availableColumns, Pattern previousPattern)
+            : base(random, hitObject, beatmap, availableColumns, previousPattern)
         {
             convertType = PatternType.None;
             if (Beatmap.ControlPointInfo.EffectPointAt(hitObject.StartTime).KiaiMode)
diff --git a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/EndTimeObjectPatternGenerator.cs b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/EndTimeObjectPatternGenerator.cs
index 6ad7489e0f..c353496410 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/EndTimeObjectPatternGenerator.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/EndTimeObjectPatternGenerator.cs
@@ -15,8 +15,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
     {
         private readonly double endTime;
 
-        public EndTimeObjectPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap)
-            : base(random, hitObject, beatmap, new Pattern())
+        public EndTimeObjectPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, int availableColumns)
+            : base(random, hitObject, beatmap, availableColumns, new Pattern())
         {
             var endtimeData = HitObject as IHasEndTime;
 
diff --git a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
index 99f55cb98b..0716671da3 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/HitObjectPatternGenerator.cs
@@ -20,8 +20,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
         private readonly PatternType convertType;
 
-        public HitObjectPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, Pattern previousPattern, double previousTime, Vector2 previousPosition, double density, PatternType lastStair)
-            : base(random, hitObject, beatmap, previousPattern)
+        public HitObjectPatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, int availableColumns, Pattern previousPattern, double previousTime, Vector2 previousPosition, double density, PatternType lastStair)
+            : base(random, hitObject, beatmap, availableColumns, previousPattern)
         {
             StairType = lastStair;
 
diff --git a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/PatternGenerator.cs b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/PatternGenerator.cs
index b72618c36c..d1b962bdd4 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/PatternGenerator.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/PatternGenerator.cs
@@ -25,8 +25,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// </summary>
         protected readonly FastRandom Random;
 
-        protected PatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, Pattern previousPattern)
-            : base(hitObject, beatmap, previousPattern)
+        protected PatternGenerator(FastRandom random, HitObject hitObject, Beatmap beatmap, int availableColumns, Pattern previousPattern)
+            : base(hitObject, beatmap, availableColumns, previousPattern)
         {
             Random = random;
 
diff --git a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/PatternGenerator.cs b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/PatternGenerator.cs
index 6ab9c86b9f..4fe100df23 100644
--- a/osu.Game.Rulesets.Mania/Beatmaps/Patterns/PatternGenerator.cs
+++ b/osu.Game.Rulesets.Mania/Beatmaps/Patterns/PatternGenerator.cs
@@ -14,7 +14,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
         /// <summary>
         /// The number of columns available to create the pattern.
         /// </summary>
-        public int AvailableColumns;
+        protected readonly int AvailableColumns;
 
         /// <summary>
         /// The last pattern.
@@ -31,11 +31,12 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
         /// </summary>
         protected readonly Beatmap Beatmap;
 
-        protected PatternGenerator(HitObject hitObject, Beatmap beatmap, Pattern previousPattern)
+        protected PatternGenerator(HitObject hitObject, Beatmap beatmap, int availableColumns, Pattern previousPattern)
         {
-            PreviousPattern = previousPattern;
             HitObject = hitObject;
             Beatmap = beatmap;
+            AvailableColumns = availableColumns;
+            PreviousPattern = previousPattern;
         }
 
         /// <summary>