diff --git a/Documentation/serial/driver b/Documentation/serial/driver
index ba84d1f38ca1d1e64bb3f15182bdf3a93f62085f..65de49a4b39e5baff983dd61509d9e5030e7df03 100644
--- a/Documentation/serial/driver
+++ b/Documentation/serial/driver
@@ -462,7 +462,8 @@ mctrl_gpio_free(dev, gpios):
 	this function.
 
 mctrl_gpio_to_gpiod(gpios, gidx)
-	This returns the gpio structure associated to the modem line index.
+	This returns the gpio_desc structure associated to the modem line
+	index.
 
 mctrl_gpio_set(gpios, mctrl):
 	This will sets the gpios according to the mctrl state.