diff --git a/libc/arch-mips/syscalls.mk b/libc/arch-mips/syscalls.mk
index 263f307..7e40c2e 100644
--- a/libc/arch-mips/syscalls.mk
+++ b/libc/arch-mips/syscalls.mk
@@ -153,6 +153,7 @@
 syscall_src += arch-mips/syscalls/__rt_sigprocmask.S
 syscall_src += arch-mips/syscalls/__rt_sigtimedwait.S
 syscall_src += arch-mips/syscalls/sigpending.S
+syscall_src += arch-mips/syscalls/signalfd4.S
 syscall_src += arch-mips/syscalls/socket.S
 syscall_src += arch-mips/syscalls/socketpair.S
 syscall_src += arch-mips/syscalls/bind.S