1 files changed, 3 insertions, 3 deletions
diff --git a/include/mbgl/style/expression/expression.hpp b/include/mbgl/style/expression/expression.hpp
index f19f64c1e7..1e34a8bd38 100644
--- a/include/mbgl/style/expression/expression.hpp
+++ b/include/mbgl/style/expression/expression.hpp
@@ -54,20 +54,20 @@ public:
         return *this;
     };
 
-    EvaluationContext& withCanonicalTileID(const mbgl::CanonicalTileID& canonical_) noexcept {
+    EvaluationContext& withCanonicalTileID(const mbgl::CanonicalTileID* canonical_) noexcept {
         canonical = canonical_;
         return *this;
     };
 
     optional<float> zoom;
     optional<mbgl::Value> accumulated;
-    optional<mbgl::CanonicalTileID> canonical;
-    GeometryTileFeature const * feature = nullptr;
+    GeometryTileFeature const* feature = nullptr;
     optional<double> colorRampParameter;
     // Contains formatted section object, std::unordered_map<std::string, Value>.
     const Value* formattedSection = nullptr;
     const FeatureState* featureState = nullptr;
     const std::set<std::string>* availableImages = nullptr;
+    const mbgl::CanonicalTileID* canonical = nullptr;
 };
 
 template <typename T>