diff --git a/Source/Core/VisualModes/VisualMode.cs b/Source/Core/VisualModes/VisualMode.cs
index 98e9438..a02a87a 100644
--- a/Source/Core/VisualModes/VisualMode.cs
+++ b/Source/Core/VisualModes/VisualMode.cs
@@ -234,7 +234,10 @@ namespace CodeImp.DoomBuilder.VisualModes
 			//mxd
 			selectedVisualSectors = null;
 			selectedVisualThings = null;
-			
+
+			//mxd. Extra floors may've been edited
+			General.Map.Renderer2D.UpdateExtraFloorFlag();
+
 			// Stop special input mode
 			General.Interface.DisableProcessing();
 			General.Interface.StopExclusiveMouseInput();