diff --git a/libc/arch-x86/syscalls.mk b/libc/arch-x86/syscalls.mk
index 623c193..2517ebf 100644
--- a/libc/arch-x86/syscalls.mk
+++ b/libc/arch-x86/syscalls.mk
@@ -63,6 +63,8 @@
 syscall_src += arch-x86/syscalls/madvise.S
 syscall_src += arch-x86/syscalls/mlock.S
 syscall_src += arch-x86/syscalls/munlock.S
+syscall_src += arch-x86/syscalls/mlockall.S
+syscall_src += arch-x86/syscalls/munlockall.S
 syscall_src += arch-x86/syscalls/mincore.S
 syscall_src += arch-x86/syscalls/__ioctl.S
 syscall_src += arch-x86/syscalls/readv.S