1 files changed, 9 insertions, 0 deletions
diff --git a/test/src/mbgl/test/conversion_stubs.hpp b/test/src/mbgl/test/conversion_stubs.hpp
index e6581c5e53..30395ddb97 100644
--- a/test/src/mbgl/test/conversion_stubs.hpp
+++ b/test/src/mbgl/test/conversion_stubs.hpp
@@ -17,6 +17,7 @@ using ValueMap = std::unordered_map<std::string, Value>;
 using ValueVector = std::vector<Value>;
 class Value : public mbgl::variant<std::string,
                                    float,
+                                   double,
                                    bool,
                                    mapbox::util::recursive_wrapper<ValueMap>,
                                    mapbox::util::recursive_wrapper<ValueVector>> {
@@ -90,6 +91,14 @@ inline optional<float> toNumber(const Value& value) {
     return {};
 }
 
+
+inline optional<double> toDouble(const Value& value) {
+    if (value.is<double>()) {
+        return value.get<double>();
+    }
+    return {};
+}
+
 inline optional<std::string> toString(const Value& value) {
     if (value.is<std::string>()) {
         return value.get<std::string>();