diff --git a/src/util/bdthreads.h b/src/util/bdthreads.h
index f6be517..ea4a243 100644
--- a/src/util/bdthreads.h
+++ b/src/util/bdthreads.h
@@ -65,7 +65,14 @@ pthread_t  createThread(bdThread &thread);
 class bdThread
 {
 	public:
-	bdThread() { return; }
+	bdThread()
+	{
+#if defined(_WIN32) || defined(__MINGW32__)
+		memset (&mTid, 0, sizeof(mTid));
+#else
+		mTid = 0;
+#endif
+	}
 virtual ~bdThread() { return; }
 
 virtual void start() { createThread(*this); }