diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 2c13155bb3bc..a0ebbc9ce5cd 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -979,7 +979,7 @@ static void imx_uart_dma_exit(struct imx_port *sport)
 
 static int imx_uart_dma_init(struct imx_port *sport)
 {
-	struct dma_slave_config slave_config;
+	struct dma_slave_config slave_config = {};
 	struct device *dev = sport->port.dev;
 	int ret;