[core] Force getGeometries() return const ref

2 files changed, 2 insertions, 2 deletions

diff --git a/src/mbgl/annotation/annotation_tile.cpp b/src/mbgl/annotation/annotation_tile.cpp
index 6c3c9eb617..a410adc95e 100644
--- a/src/mbgl/annotation/annotation_tile.cpp
+++ b/src/mbgl/annotation/annotation_tile.cpp
@@ -58,7 +58,7 @@ FeatureIdentifier AnnotationTileFeature::getID() const {
     return data->id;
 }
 
-GeometryCollection AnnotationTileFeature::getGeometries() const {
+const GeometryCollection& AnnotationTileFeature::getGeometries() const {
     return data->geometries;
 }
 
diff --git a/src/mbgl/annotation/annotation_tile.hpp b/src/mbgl/annotation/annotation_tile.hpp
index 1e23fdf98a..741b598a8c 100644
--- a/src/mbgl/annotation/annotation_tile.hpp
+++ b/src/mbgl/annotation/annotation_tile.hpp
@@ -28,7 +28,7 @@ public:
     FeatureType getType() const override;
     optional<Value> getValue(const std::string&) const override;
     FeatureIdentifier getID() const override;
-    GeometryCollection getGeometries() const override;
+    const GeometryCollection& getGeometries() const override;
 
 private:
     std::shared_ptr<const AnnotationTileFeatureData> data;