diff --git a/libc/kernel/uapi/linux/cec.h b/libc/kernel/uapi/linux/cec.h
index 3fcee96..98892f7 100644
--- a/libc/kernel/uapi/linux/cec.h
+++ b/libc/kernel/uapi/linux/cec.h
@@ -130,6 +130,8 @@
 #define CEC_EVENT_LOST_MSGS 2
 #define CEC_EVENT_PIN_CEC_LOW 3
 #define CEC_EVENT_PIN_CEC_HIGH 4
+#define CEC_EVENT_PIN_HPD_LOW 5
+#define CEC_EVENT_PIN_HPD_HIGH 6
 #define CEC_EVENT_FL_INITIAL_STATE (1 << 0)
 #define CEC_EVENT_FL_DROPPED_EVENTS (1 << 1)
 struct cec_event_state_change {