diff --git a/libc/arch-arm64/syscalls/__brk.S b/libc/arch-arm64/syscalls/__brk.S
index 85ed767..e91e762 100644
--- a/libc/arch-arm64/syscalls/__brk.S
+++ b/libc/arch-arm64/syscalls/__brk.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(__brk)
     mov     x8, __NR_brk
     svc     #0