1 files changed, 3 insertions, 2 deletions
diff --git a/src/mbgl/renderer/tile_parameters.hpp b/src/mbgl/renderer/tile_parameters.hpp
index cf7a5b100a..665c7490d2 100644
--- a/src/mbgl/renderer/tile_parameters.hpp
+++ b/src/mbgl/renderer/tile_parameters.hpp
@@ -13,8 +13,8 @@ class GlyphManager;
 
 class TileParameters {
 public:
-    float pixelRatio;
-    MapDebugOptions debugOptions;
+    const float pixelRatio;
+    const MapDebugOptions debugOptions;
     const TransformState& transformState;
     Scheduler& workerScheduler;
     FileSource& fileSource;
@@ -22,6 +22,7 @@ public:
     AnnotationManager& annotationManager;
     ImageManager& imageManager;
     GlyphManager& glyphManager;
+    const uint8_t prefetchZoomDelta;
 };
 
 } // namespace mbgl