diff --git a/libc/arch-sh/syscalls.mk b/libc/arch-sh/syscalls.mk
index b690bbf..3e2274f 100644
--- a/libc/arch-sh/syscalls.mk
+++ b/libc/arch-sh/syscalls.mk
@@ -75,6 +75,7 @@
 syscall_src += arch-sh/syscalls/ftruncate.S
 syscall_src += arch-sh/syscalls/getdents.S
 syscall_src += arch-sh/syscalls/fsync.S
+syscall_src += arch-sh/syscalls/fdatasync.S
 syscall_src += arch-sh/syscalls/fchown.S
 syscall_src += arch-sh/syscalls/sync.S
 syscall_src += arch-sh/syscalls/__fcntl64.S