diff --git a/src/openrct2-ui/drawing/engines/opengl/OpenGLDrawingEngine.cpp b/src/openrct2-ui/drawing/engines/opengl/OpenGLDrawingEngine.cpp
index 275353832c..73ea92a35e 100644
--- a/src/openrct2-ui/drawing/engines/opengl/OpenGLDrawingEngine.cpp
+++ b/src/openrct2-ui/drawing/engines/opengl/OpenGLDrawingEngine.cpp
@@ -275,8 +275,8 @@ public:
 
     void ConfigureDirtyGrid()
     {
-        const auto blockWidth = 1u << 7;
-        const auto blockHeight = 1u << 5;
+        const auto blockWidth = 1u << 8;
+        const auto blockHeight = 1u << 8;
 
         _invalidationGrid.reset(_width, _height, blockWidth, blockHeight);
     }