diff --git a/libc/libc.x86_64.map b/libc/libc.x86_64.map
index ac9d009..c42d1b6 100644
--- a/libc/libc.x86_64.map
+++ b/libc/libc.x86_64.map
@@ -1196,6 +1196,7 @@
 LIBC_O {
   global:
     getdomainname;
+    getsubopt;
     hasmntopt;
     pthread_getname_np;
     setdomainname;