diff --git a/gpiozero/boards.py b/gpiozero/boards.py
index 904f137..a42dc5f 100644
--- a/gpiozero/boards.py
+++ b/gpiozero/boards.py
@@ -572,7 +572,7 @@ class SnowPi(LEDBoard):
 
 class TrafficLightsBuzzer(CompositeOutputDevice):
     """
-    Extends :class:`CompositeDevice` and is a generic class for HATs with
+    Extends :class:`CompositeOutputDevice` and is a generic class for HATs with
     traffic lights, a button and a buzzer.
 
     :param TrafficLights lights:
diff --git a/gpiozero/input_devices.py b/gpiozero/input_devices.py
index 3807d84..3f38a86 100644
--- a/gpiozero/input_devices.py
+++ b/gpiozero/input_devices.py
@@ -279,7 +279,7 @@ Button.wait_for_release = Button.wait_for_inactive
 
 class LineSensor(SmoothedInputDevice):
     """
-    Extends :class:`DigitalInputDevice` and represents a single pin line sensor
+    Extends :class:`SmoothedInputDevice` and represents a single pin line sensor
     like the TCRT5000 infra-red proximity sensor found in the `CamJam #3
     EduKit`_.