diff --git a/libc/kernel/uapi/linux/tty.h b/libc/kernel/uapi/linux/tty.h
index fb2379e..a94e6e6 100644
--- a/libc/kernel/uapi/linux/tty.h
+++ b/libc/kernel/uapi/linux/tty.h
@@ -48,5 +48,6 @@
 #define N_NULL 27
 #define N_MCTP 28
 #define N_DEVELOPMENT 29
-#define NR_LDISCS 30
+#define N_CAN327 30
+#define NR_LDISCS 31
 #endif