diff --git a/libc/arch-sh/syscalls.mk b/libc/arch-sh/syscalls.mk
index 1d87600..9970fcf 100644
--- a/libc/arch-sh/syscalls.mk
+++ b/libc/arch-sh/syscalls.mk
@@ -15,6 +15,7 @@
 syscall_src += arch-sh/syscalls/getresuid.S
 syscall_src += arch-sh/syscalls/getresgid.S
 syscall_src += arch-sh/syscalls/gettid.S
+syscall_src += arch-sh/syscalls/readahead.S
 syscall_src += arch-sh/syscalls/getgroups.S
 syscall_src += arch-sh/syscalls/getpgid.S
 syscall_src += arch-sh/syscalls/getppid.S