diff --git a/drivers/serial/uart_stm32.c b/drivers/serial/uart_stm32.c
index 13c85a5066d..191e4ebe5c0 100644
--- a/drivers/serial/uart_stm32.c
+++ b/drivers/serial/uart_stm32.c
@@ -1163,6 +1163,9 @@ static inline void async_evt_tx_done(struct uart_stm32_data *data)
 	/* Reset tx buffer */
 	data->dma_tx.buffer_length = 0;
 	data->dma_tx.counter = 0;
+#ifdef CONFIG_PM
+	data->tx_int_stream_on = false;
+#endif
 
 	async_user_callback(data, &event);
 }
@@ -1180,6 +1183,9 @@ static inline void async_evt_tx_abort(struct uart_stm32_data *data)
 	/* Reset tx buffer */
 	data->dma_tx.buffer_length = 0;
 	data->dma_tx.counter = 0;
+#ifdef CONFIG_PM
+	data->tx_int_stream_on = false;
+#endif
 
 	async_user_callback(data, &event);
 }
@@ -1603,6 +1609,10 @@ static int uart_stm32_async_tx(const struct device *dev,
 	}
 #endif /* CONFIG_DCACHE */
 
+#ifdef CONFIG_PM
+	data->tx_poll_stream_on = false;
+	data->tx_int_stream_on = true;
+#endif
 	data->dma_tx.buffer = (uint8_t *)tx_data;
 	data->dma_tx.buffer_length = buf_size;
 	data->dma_tx.timeout = timeout;