diff --git a/osu.Game.Rulesets.Catch/Edit/CatchBlueprintContainer.cs b/osu.Game.Rulesets.Catch/Edit/CatchBlueprintContainer.cs
index 20d432d62e..a0a11424d0 100644
--- a/osu.Game.Rulesets.Catch/Edit/CatchBlueprintContainer.cs
+++ b/osu.Game.Rulesets.Catch/Edit/CatchBlueprintContainer.cs
@@ -5,7 +5,6 @@
 
 using osu.Game.Rulesets.Catch.Edit.Blueprints;
 using osu.Game.Rulesets.Catch.Objects;
-using osu.Game.Rulesets.Catch.UI;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Screens.Edit.Compose.Components;
@@ -38,6 +37,6 @@ namespace osu.Game.Rulesets.Catch.Edit
             return base.CreateHitObjectBlueprintFor(hitObject);
         }
 
-        protected sealed override DragBox CreateDragBox() => new ScrollingDragBox((CatchPlayfield)Composer.Playfield);
+        protected sealed override DragBox CreateDragBox() => new ScrollingDragBox(Composer.Playfield);
     }
 }
diff --git a/osu.Game.Rulesets.Mania/Edit/ManiaBlueprintContainer.cs b/osu.Game.Rulesets.Mania/Edit/ManiaBlueprintContainer.cs
index c3fad1e22b..f438d6497c 100644
--- a/osu.Game.Rulesets.Mania/Edit/ManiaBlueprintContainer.cs
+++ b/osu.Game.Rulesets.Mania/Edit/ManiaBlueprintContainer.cs
@@ -6,7 +6,6 @@
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Edit.Blueprints;
 using osu.Game.Rulesets.Mania.Objects;
-using osu.Game.Rulesets.Mania.UI;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Screens.Edit.Compose.Components;
 
@@ -35,6 +34,6 @@ namespace osu.Game.Rulesets.Mania.Edit
 
         protected override SelectionHandler<HitObject> CreateSelectionHandler() => new ManiaSelectionHandler();
 
-        protected sealed override DragBox CreateDragBox() => new ScrollingDragBox((ManiaPlayfield)Composer.Playfield);
+        protected sealed override DragBox CreateDragBox() => new ScrollingDragBox(Composer.Playfield);
     }
 }
diff --git a/osu.Game/Screens/Edit/Compose/Components/ScrollingDragBox.cs b/osu.Game/Screens/Edit/Compose/Components/ScrollingDragBox.cs
index 2d2c88247b..58bfaf56ff 100644
--- a/osu.Game/Screens/Edit/Compose/Components/ScrollingDragBox.cs
+++ b/osu.Game/Screens/Edit/Compose/Components/ScrollingDragBox.cs
@@ -3,6 +3,7 @@
 
 using System;
 using osu.Framework.Input.Events;
+using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.UI.Scrolling;
 
 namespace osu.Game.Screens.Edit.Compose.Components
@@ -20,9 +21,9 @@ namespace osu.Game.Screens.Edit.Compose.Components
 
         private readonly ScrollingPlayfield playfield;
 
-        public ScrollingDragBox(ScrollingPlayfield playfield)
+        public ScrollingDragBox(Playfield playfield)
         {
-            this.playfield = playfield;
+            this.playfield = playfield as ScrollingPlayfield ?? throw new ArgumentException("Playfield must be of type {nameof(ScrollingPlayfield)} to use this class.", nameof(playfield));
         }
 
         public override void HandleDrag(MouseButtonEvent e)