diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h
index 9716db2..bcfad5d 100644
--- a/drivers/tty/serial/serial_mctrl_gpio.h
+++ b/drivers/tty/serial/serial_mctrl_gpio.h
@@ -62,7 +62,7 @@
 				      enum mctrl_gpio_idx gidx);
 
 /*
- * Request and set direction of modem control lines GPIOs and sets up irq
+ * Request and set direction of modem control line GPIOs and set up irq
  * handling.
  * devm_* functions are used, so there's no need to call mctrl_gpio_free().
  * Returns a pointer to the allocated mctrl structure if ok, -ENOMEM on
@@ -71,7 +71,7 @@
 struct mctrl_gpios *mctrl_gpio_init(struct uart_port *port, unsigned int idx);
 
 /*
- * Request and set direction of modem control lines GPIOs.
+ * Request and set direction of modem control line GPIOs.
  * devm_* functions are used, so there's no need to call mctrl_gpio_free().
  * Returns a pointer to the allocated mctrl structure if ok, -ENOMEM on
  * allocation error.