diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index b6548b910d94..185dd417fc49 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1787,6 +1787,7 @@ static void lpuart_dma_shutdown(struct lpuart_port *sport)
 	if (sport->lpuart_dma_rx_use) {
 		del_timer_sync(&sport->lpuart_timer);
 		lpuart_dma_rx_free(&sport->port);
+		sport->lpuart_dma_rx_use = false;
 	}
 
 	if (sport->lpuart_dma_tx_use) {
@@ -1795,6 +1796,7 @@ static void lpuart_dma_shutdown(struct lpuart_port *sport)
 			sport->dma_tx_in_progress = false;
 			dmaengine_terminate_all(sport->dma_tx_chan);
 		}
+		sport->lpuart_dma_tx_use = false;
 	}
 
 	if (sport->dma_tx_chan)