diff --git a/serial.c b/serial.c
index a440a754c..e122997a9 100644
--- a/serial.c
+++ b/serial.c
@@ -335,6 +335,11 @@ static int apply_settings(struct sp_port *port, unsigned int baud_rate,
 {
 	int ret;
 
+#ifdef _WIN32
+	ret = libserialport_to_errno(sp_set_dtr(port, SP_DTR_ON));
+	if (ret)
+		return ret;
+#endif
 	ret = libserialport_to_errno(sp_set_baudrate(port, (int) baud_rate));
 	if (ret)
 		return ret;