diff --git a/homeassistant/components/webostv/services.yaml b/homeassistant/components/webostv/services.yaml
index 0fb3cd1ae16..1985857d128 100644
--- a/homeassistant/components/webostv/services.yaml
+++ b/homeassistant/components/webostv/services.yaml
@@ -17,7 +17,7 @@ button:
       description: >-
         Name of the button to press.  Known possible values are
         LEFT, RIGHT, DOWN, UP, HOME, MENU, BACK, ENTER, DASH, INFO, ASTERISK, CC, EXIT,
-        MUTE, RED, GREEN, BLUE, VOLUMEUP, VOLUMEDOWN, CHANNELUP, CHANNELDOWN,
+        MUTE, RED, GREEN, BLUE, YELLOW, VOLUMEUP, VOLUMEDOWN, CHANNELUP, CHANNELDOWN,
         PLAY, PAUSE, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
       required: true
       example: "LEFT"