diff --git a/libc/arch-x86_64/syscalls/sendmmsg.S b/libc/arch-x86_64/syscalls/sendmmsg.S
index 940c0b6..47b2e3a 100644
--- a/libc/arch-x86_64/syscalls/sendmmsg.S
+++ b/libc/arch-x86_64/syscalls/sendmmsg.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(sendmmsg)
     movq    %rcx, %r10
     movl    $__NR_sendmmsg, %eax