diff --git a/hw/serial.c b/hw/serial.c
index b499bca659..a421d1e7bc 100644
--- a/hw/serial.c
+++ b/hw/serial.c
@@ -332,6 +332,7 @@ static void serial_xmit(void *opaque)
         } else {
             s->tsr = s->thr;
             s->lsr |= UART_LSR_THRE;
+            s->lsr &= ~UART_LSR_TEMT;
         }
     }