diff --git a/homeassistant/components/roku/media_player.py b/homeassistant/components/roku/media_player.py
index 12aca141510..84a1982fb49 100644
--- a/homeassistant/components/roku/media_player.py
+++ b/homeassistant/components/roku/media_player.py
@@ -174,7 +174,7 @@ class RokuDevice(MediaPlayerDevice):
 
     def turn_on(self):
         """Turn on the Roku."""
-        self.roku.power()
+        self.roku.poweron()
 
     def turn_off(self):
         """Turn off the Roku."""