diff --git a/src/openrct2/drawing/X8DrawingEngine.cpp b/src/openrct2/drawing/X8DrawingEngine.cpp
index 7a921c6039..9f08cc4907 100644
--- a/src/openrct2/drawing/X8DrawingEngine.cpp
+++ b/src/openrct2/drawing/X8DrawingEngine.cpp
@@ -129,7 +129,6 @@ X8DrawingEngine::X8DrawingEngine([[maybe_unused]] const std::shared_ptr<Ui::IUiC
 X8DrawingEngine::~X8DrawingEngine()
 {
     delete _drawingContext;
-    delete[] _dirtyGrid.Blocks;
     delete[] _bits;
 }
 
diff --git a/src/openrct2/drawing/X8DrawingEngine.h b/src/openrct2/drawing/X8DrawingEngine.h
index abc35ad61a..5acfd798f7 100644
--- a/src/openrct2/drawing/X8DrawingEngine.h
+++ b/src/openrct2/drawing/X8DrawingEngine.h
@@ -26,17 +26,6 @@ namespace OpenRCT2
     {
         class X8DrawingContext;
 
-        struct DirtyGrid
-        {
-            uint32_t BlockShiftX;
-            uint32_t BlockShiftY;
-            uint32_t BlockWidth;
-            uint32_t BlockHeight;
-            uint32_t BlockColumns;
-            uint32_t BlockRows;
-            uint8_t* Blocks;
-        };
-
         class X8WeatherDrawer final : public IWeatherDrawer
         {
         private:
@@ -74,8 +63,6 @@ namespace OpenRCT2
             size_t _bitsSize = 0;
             uint8_t* _bits = nullptr;
 
-            DirtyGrid _dirtyGrid = {};
-
             DrawPixelInfo _bitsDPI = {};
 
             bool _lastLightFXenabled = false;