diff --git a/src/mbgl/map/geometry_tile.cpp b/src/mbgl/map/geometry_tile.cpp
index 0d7931b77..defff0ebf 100644
--- a/src/mbgl/map/geometry_tile.cpp
+++ b/src/mbgl/map/geometry_tile.cpp
@@ -18,7 +18,7 @@ std::ostream& mbgl::operator<<(std::ostream& os, const GeometryFeatureType& type
 std::ostream& mbgl::operator<<(std::ostream& os, const GeometryTileFeature& feature) {
     os << "Feature(" << feature.id << "): " << feature.type << std::endl;
     for (const auto& prop : feature.properties) {
-        os << "  - " << prop.first << ": " << prop.second << std::endl;
+        os << "  - " << prop.first << ": " << &prop.second << std::endl;
     }
     return os;
 }