diff --git a/test/ShutdownHandler.hxx b/test/ShutdownHandler.hxx
index 2283225d2..58ae74790 100644
--- a/test/ShutdownHandler.hxx
+++ b/test/ShutdownHandler.hxx
@@ -29,8 +29,8 @@ public:
 };
 
 #ifdef _WIN32
-ShutdownHandler::ShutdownHandler(EventLoop &loop) {}
-ShutdownHandler::~ShutdownHandler() {}
+inline ShutdownHandler::ShutdownHandler(EventLoop &) {}
+inline ShutdownHandler::~ShutdownHandler() {}
 #endif
 
 #endif