diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 8efba0bf8505449890d09140b433417491a16a90..c1d9851788031d8418034bf7e4ab72f823b55794 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -91,9 +91,6 @@ static size_t write_to_port(VirtIOSerialPort *port,
     if (!virtio_queue_ready(vq)) {
         return 0;
     }
-    if (!size) {
-        return 0;
-    }
 
     while (offset < size) {
         int i;