diff --git a/libc/kernel/uapi/misc/fastrpc.h b/libc/kernel/uapi/misc/fastrpc.h
index 762eefc..62955ec 100644
--- a/libc/kernel/uapi/misc/fastrpc.h
+++ b/libc/kernel/uapi/misc/fastrpc.h
@@ -26,6 +26,7 @@
 #define FASTRPC_IOCTL_INIT_CREATE _IOWR('R', 5, struct fastrpc_init_create)
 #define FASTRPC_IOCTL_MMAP _IOWR('R', 6, struct fastrpc_req_mmap)
 #define FASTRPC_IOCTL_MUNMAP _IOWR('R', 7, struct fastrpc_req_munmap)
+#define FASTRPC_IOCTL_INIT_ATTACH_SNS _IO('R', 8)
 struct fastrpc_invoke_args {
   __u64 ptr;
   __u64 length;