diff --git a/libc/arch-arm/syscalls.mk b/libc/arch-arm/syscalls.mk
index 565c2bd..62eda87 100644
--- a/libc/arch-arm/syscalls.mk
+++ b/libc/arch-arm/syscalls.mk
@@ -59,6 +59,8 @@
 syscall_src += arch-arm/syscalls/madvise.S
 syscall_src += arch-arm/syscalls/mlock.S
 syscall_src += arch-arm/syscalls/munlock.S
+syscall_src += arch-arm/syscalls/mlockall.S
+syscall_src += arch-arm/syscalls/munlockall.S
 syscall_src += arch-arm/syscalls/mincore.S
 syscall_src += arch-arm/syscalls/__ioctl.S
 syscall_src += arch-arm/syscalls/readv.S