diff --git a/src/cressi_leonardo.c b/src/cressi_leonardo.c
index f75d4bb..4411254 100644
--- a/src/cressi_leonardo.c
+++ b/src/cressi_leonardo.c
@@ -131,6 +131,9 @@ cressi_leonardo_device_open (dc_device_t **out, dc_context_t *context, const cha
 		return DC_STATUS_IO;
 	}
 
+	serial_sleep (device->port, 100);
+	serial_flush (device->port, SERIAL_QUEUE_BOTH);
+
 	*out = (dc_device_t *) device;
 
 	return DC_STATUS_SUCCESS;