diff --git a/Source/Plugins/3DFloorMode/DrawSlopesMode.cs b/Source/Plugins/3DFloorMode/DrawSlopesMode.cs
index 74f9b55ee13cff0fec5ee3d5274697a73918eff5..b4f78d7ad284fbb5c647cbec6cbe52fc4583588c 100644
--- a/Source/Plugins/3DFloorMode/DrawSlopesMode.cs
+++ b/Source/Plugins/3DFloorMode/DrawSlopesMode.cs
@@ -50,8 +50,8 @@ namespace CodeImp.DoomBuilder.ThreeDFloorMode
 			  SupportedMapFormats = new[] { "UniversalMapSetIO" },
 			  RequiredMapFeatures = new[] { "PlaneEquationSupport" },
 			  Volatile = true,
-			  UseByDefault = true,
-			  Optional = false,
+			  UseByDefault = false,
+			  Optional = true,
 			  IsDeprecated = true,
 			  DeprecationMessage = "Please use the visual sloping functionality instead.")]
 	public class DrawSlopesMode : ClassicMode