diff --git a/src/TSMapEditor/Mutations/Classes/HeightMutations/AlterElevationMutationBase.cs b/src/TSMapEditor/Mutations/Classes/HeightMutations/AlterElevationMutationBase.cs
index fbf35e54..7081446e 100644
--- a/src/TSMapEditor/Mutations/Classes/HeightMutations/AlterElevationMutationBase.cs
+++ b/src/TSMapEditor/Mutations/Classes/HeightMutations/AlterElevationMutationBase.cs
@@ -126,7 +126,7 @@ private void RefreshLighting()
             {
                 var cellCoords = totalProcessedCells[i];
                 var cell = Map.GetTile(cellCoords);
-                cell.RefreshLighting(Map.Lighting, MutationTarget.LightingPreviewState);
+                cell?.RefreshLighting(Map.Lighting, MutationTarget.LightingPreviewState);
             }
         }