diff --git a/esphome/const.py b/esphome/const.py
index d62dc617d1..f3f177b3ae 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -696,6 +696,7 @@ CONF_OPEN_DRAIN = "open_drain"
 CONF_OPEN_DRAIN_INTERRUPT = "open_drain_interrupt"
 CONF_OPEN_DURATION = "open_duration"
 CONF_OPEN_ENDSTOP = "open_endstop"
+CONF_OPENTHREAD = "openthread"
 CONF_OPERATION = "operation"
 CONF_OPTIMISTIC = "optimistic"
 CONF_OPTION = "option"