diff --git a/libc/arch-arm/syscalls/fchmodat.S b/libc/arch-arm/syscalls/fchmodat.S
index e03da8c..8e43118 100644
--- a/libc/arch-arm/syscalls/fchmodat.S
+++ b/libc/arch-arm/syscalls/fchmodat.S
@@ -2,6 +2,8 @@
 
 #include <private/bionic_asm.h>
 
+    .hidden __set_errno
+
 ENTRY(fchmodat)
     mov     ip, r7
     ldr     r7, =__NR_fchmodat