diff --git a/osu.Game/Rulesets/Objects/Legacy/Catch/ConvertHitObjectParser.cs b/osu.Game/Rulesets/Objects/Legacy/Catch/ConvertHitObjectParser.cs
index 48f637dfe8..c968fe469a 100644
--- a/osu.Game/Rulesets/Objects/Legacy/Catch/ConvertHitObjectParser.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/Catch/ConvertHitObjectParser.cs
@@ -37,7 +37,8 @@ namespace osu.Game.Rulesets.Objects.Legacy.Catch
             };
         }
 
-        protected override HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double length, PathType pathType, int repeatCount, List<List<SampleInfo>> nodeSamples)
+        protected override HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double? length, PathType pathType, int repeatCount,
+                                                  List<List<SampleInfo>> nodeSamples)
         {
             newCombo |= forceNewCombo;
             comboOffset += extraComboOffset;
diff --git a/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs b/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
index c14f3b6a42..36ae15efcc 100644
--- a/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
@@ -72,7 +72,7 @@ namespace osu.Game.Rulesets.Objects.Legacy
                 else if (type.HasFlag(ConvertHitObjectType.Slider))
                 {
                     PathType pathType = PathType.Catmull;
-                    double length = 0;
+                    double? length = null;
 
                     string[] pointSplit = split[5].Split('|');
 
@@ -130,7 +130,11 @@ namespace osu.Game.Rulesets.Objects.Legacy
                     repeatCount = Math.Max(0, repeatCount - 1);
 
                     if (split.Length > 7)
+                    {
                         length = Math.Max(0, Parsing.ParseDouble(split[7]));
+                        if (length == 0)
+                            length = null;
+                    }
 
                     if (split.Length > 10)
                         readCustomSampleBanks(split[10], bankInfo);
@@ -291,7 +295,8 @@ namespace osu.Game.Rulesets.Objects.Legacy
         /// <param name="repeatCount">The slider repeat count.</param>
         /// <param name="nodeSamples">The samples to be played when the slider nodes are hit. This includes the head and tail of the slider.</param>
         /// <returns>The hit object.</returns>
-        protected abstract HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double length, PathType pathType, int repeatCount, List<List<SampleInfo>> nodeSamples);
+        protected abstract HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double? length, PathType pathType, int repeatCount,
+                                                  List<List<SampleInfo>> nodeSamples);
 
         /// <summary>
         /// Creates a legacy Spinner-type hit object.
diff --git a/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertHitObjectParser.cs b/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertHitObjectParser.cs
index 8a3e232e60..5acc085ba1 100644
--- a/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertHitObjectParser.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/Mania/ConvertHitObjectParser.cs
@@ -26,7 +26,8 @@ namespace osu.Game.Rulesets.Objects.Legacy.Mania
             };
         }
 
-        protected override HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double length, PathType pathType, int repeatCount, List<List<SampleInfo>> nodeSamples)
+        protected override HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double? length, PathType pathType, int repeatCount,
+                                                  List<List<SampleInfo>> nodeSamples)
         {
             return new ConvertSlider
             {
diff --git a/osu.Game/Rulesets/Objects/Legacy/Osu/ConvertHitObjectParser.cs b/osu.Game/Rulesets/Objects/Legacy/Osu/ConvertHitObjectParser.cs
index b98de32bd0..d46e1fa86a 100644
--- a/osu.Game/Rulesets/Objects/Legacy/Osu/ConvertHitObjectParser.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/Osu/ConvertHitObjectParser.cs
@@ -1,7 +1,6 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using System;
 using osuTK;
 using osu.Game.Rulesets.Objects.Types;
 using System.Collections.Generic;
@@ -38,7 +37,8 @@ namespace osu.Game.Rulesets.Objects.Legacy.Osu
             };
         }
 
-        protected override HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double length, PathType pathType, int repeatCount, List<List<SampleInfo>> nodeSamples)
+        protected override HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double? length, PathType pathType, int repeatCount,
+                                                  List<List<SampleInfo>> nodeSamples)
         {
             newCombo |= forceNewCombo;
             comboOffset += extraComboOffset;
@@ -51,7 +51,7 @@ namespace osu.Game.Rulesets.Objects.Legacy.Osu
                 Position = position,
                 NewCombo = FirstObject || newCombo,
                 ComboOffset = comboOffset,
-                Path = new SliderPath(pathType, controlPoints, Math.Max(0, length)),
+                Path = new SliderPath(pathType, controlPoints, length),
                 NodeSamples = nodeSamples,
                 RepeatCount = repeatCount
             };
diff --git a/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertHitObjectParser.cs b/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertHitObjectParser.cs
index bab21b31ad..39fb9e3b3a 100644
--- a/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertHitObjectParser.cs
+++ b/osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertHitObjectParser.cs
@@ -23,7 +23,8 @@ namespace osu.Game.Rulesets.Objects.Legacy.Taiko
             return new ConvertHit();
         }
 
-        protected override HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double length, PathType pathType, int repeatCount, List<List<SampleInfo>> nodeSamples)
+        protected override HitObject CreateSlider(Vector2 position, bool newCombo, int comboOffset, Vector2[] controlPoints, double? length, PathType pathType, int repeatCount,
+                                                  List<List<SampleInfo>> nodeSamples)
         {
             return new ConvertSlider
             {