diff --git a/libc/arch-arm/syscalls.mk b/libc/arch-arm/syscalls.mk
index 83e6a97..f039bcb 100644
--- a/libc/arch-arm/syscalls.mk
+++ b/libc/arch-arm/syscalls.mk
@@ -56,6 +56,7 @@
 syscall_src += arch-arm/syscalls/eventfd.S
 syscall_src += arch-arm/syscalls/execve.S
 syscall_src += arch-arm/syscalls/faccessat.S
+syscall_src += arch-arm/syscalls/fallocate64.S
 syscall_src += arch-arm/syscalls/fchdir.S
 syscall_src += arch-arm/syscalls/fchmod.S
 syscall_src += arch-arm/syscalls/fchmodat.S