diff --git a/src/common/PJoystickHandler.hxx b/src/common/PJoystickHandler.hxx
index 017479ceb..444ef1a6a 100644
--- a/src/common/PJoystickHandler.hxx
+++ b/src/common/PJoystickHandler.hxx
@@ -50,7 +50,7 @@ class PhysicalJoystickHandler
     struct StickInfo
     {
       StickInfo(const nlohmann::json& map = nullptr, PhysicalJoystickPtr stick = nullptr)
-        : mapping{map}, joy{std::move(stick)} { }
+        : mapping(map), joy{std::move(stick)} { }
 
       nlohmann::json mapping;
       PhysicalJoystickPtr joy;