diff --git a/include/syscall-types.h b/include/syscall-types.h
index 859862399..332fa220e 100644
--- a/include/syscall-types.h
+++ b/include/syscall-types.h
@@ -34,6 +34,7 @@ struct cap_data {
 struct sockaddr;
 struct msghdr;
 struct rusage;
+struct file_handle;
 
 #ifndef F_GETFD
 #define F_GETFD 1
diff --git a/include/syscall-x86-64.def b/include/syscall-x86-64.def
index 50c092676..c10951d06 100644
--- a/include/syscall-x86-64.def
+++ b/include/syscall-x86-64.def
@@ -54,5 +54,6 @@ __NR_set_thread_area	205		sys_set_thread_area	(user_desc_t *info)
 __NR_get_thread_area	211		sys_get_thread_area	(user_desc_t *info)
 __NR_set_tid_address	218		sys_set_tid_address	(int *tid_addr)
 __NR_restart_syscall	219		sys_restart_syscall	(void)
+__NR_open_by_handle_at	304		sys_open_by_handle_at	(int mountdirfd, struct file_handle *handle, int flags)
 __NR_setns		308		sys_setns		(int fd, int nstype)
 __NR_kcmp		312		sys_kcmp		(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2)