diff --git a/include/mbgl/storage/resource.hpp b/include/mbgl/storage/resource.hpp
index d684e16d1..c97384e6a 100644
--- a/include/mbgl/storage/resource.hpp
+++ b/include/mbgl/storage/resource.hpp
@@ -22,7 +22,7 @@ public:
 
     struct TileData {
         std::string urlTemplate;
-        float pixelRatio;
+        uint8_t pixelRatio;
         int32_t x;
         int32_t y;
         int8_t z;
diff --git a/src/mbgl/storage/resource.cpp b/src/mbgl/storage/resource.cpp
index 9cdedb59e..6f727a602 100644
--- a/src/mbgl/storage/resource.cpp
+++ b/src/mbgl/storage/resource.cpp
@@ -71,7 +71,7 @@ Resource Resource::tile(const std::string& urlTemplate, float pixelRatio, int32_
         }),
         Resource::TileData {
             urlTemplate,
-            pixelRatio,
+            uint8_t(pixelRatio > 1.0 ? 2 : 1),
             x,
             y,
             z