diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index 75c7757..640fa4a 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -1247,6 +1247,7 @@
 
 LIBC_O {
   global:
+    __sendto_chk; # future
     __system_property_read_callback; # future
     bsd_signal; # arm x86 mips versioned=26
     catclose; # future