diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 16aeb14201378..8df5be8ca824e 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -3278,6 +3278,7 @@ void serial8250_init_port(struct uart_8250_port *up)
 
 	spin_lock_init(&port->lock);
 	port->ctrl_id = 0;
+	port->pm = NULL;
 	port->ops = &serial8250_pops;
 	port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);