diff --git a/libc/arch-x86/syscalls.mk b/libc/arch-x86/syscalls.mk
index 3b85025..48d1731 100644
--- a/libc/arch-x86/syscalls.mk
+++ b/libc/arch-x86/syscalls.mk
@@ -15,6 +15,7 @@
 syscall_src += arch-x86/syscalls/getresuid.S
 syscall_src += arch-x86/syscalls/getresgid.S
 syscall_src += arch-x86/syscalls/gettid.S
+syscall_src += arch-x86/syscalls/readahead.S
 syscall_src += arch-x86/syscalls/getgroups.S
 syscall_src += arch-x86/syscalls/getpgid.S
 syscall_src += arch-x86/syscalls/getppid.S