diff --git a/libc/kernel/uapi/linux/landlock.h b/libc/kernel/uapi/linux/landlock.h
index 75d3037..f903ae6 100644
--- a/libc/kernel/uapi/linux/landlock.h
+++ b/libc/kernel/uapi/linux/landlock.h
@@ -39,6 +39,7 @@
 #define LANDLOCK_ACCESS_FS_MAKE_SYM (1ULL << 12)
 #define LANDLOCK_ACCESS_FS_REFER (1ULL << 13)
 #define LANDLOCK_ACCESS_FS_TRUNCATE (1ULL << 14)
+#define LANDLOCK_ACCESS_FS_IOCTL_DEV (1ULL << 15)
 #define LANDLOCK_ACCESS_NET_BIND_TCP (1ULL << 0)
 #define LANDLOCK_ACCESS_NET_CONNECT_TCP (1ULL << 1)
 #endif