diff --git a/WorldSim.Godot/Scripts/ClockworkObservatory.cs b/WorldSim.Godot/Scripts/ClockworkObservatory.cs
index 4e93a58..e220519 100644
--- a/WorldSim.Godot/Scripts/ClockworkObservatory.cs
+++ b/WorldSim.Godot/Scripts/ClockworkObservatory.cs
@@ -84,17 +84,15 @@ private void BuildUi()
         var contentSplit = new HSplitContainer
         {
             SizeFlagsHorizontal = SizeFlags.ExpandFill,
-            SizeFlagsVertical = SizeFlags.ExpandFill,
-#pragma warning disable CS0618 // Type or member is obsolete
-            SplitOffset = 1060
-#pragma warning restore CS0618 // Type or member is obsolete
+            SizeFlagsVertical = SizeFlags.ExpandFill
         };
         root.AddChild(contentSplit);
 
         var leftPanel = new VBoxContainer
         {
             SizeFlagsHorizontal = SizeFlags.ExpandFill,
-            SizeFlagsVertical = SizeFlags.ExpandFill
+            SizeFlagsVertical = SizeFlags.ExpandFill,
+            CustomMinimumSize = new Vector2(1060f, 0f)
         };
         contentSplit.AddChild(leftPanel);