diff --git a/src/vmime/platforms/windows/windowsSocket.hpp b/src/vmime/platforms/windows/windowsSocket.hpp
index 8e9df2a1..f2d2f550 100644
--- a/src/vmime/platforms/windows/windowsSocket.hpp
+++ b/src/vmime/platforms/windows/windowsSocket.hpp
@@ -73,6 +73,7 @@ public:
 	const string getPeerAddress() const;
 
 	shared_ptr <net::timeoutHandler> getTimeoutHandler();
+	shared_ptr <net::tracer> m_tracer;
 
 	void setTracer(shared_ptr <net::tracer> tracer);
 	shared_ptr <net::tracer> getTracer();