diff --git a/libc/libc.x86.brillo.map b/libc/libc.x86.brillo.map
index 090d5c5..c6277dc 100644
--- a/libc/libc.x86.brillo.map
+++ b/libc/libc.x86.brillo.map
@@ -1217,6 +1217,7 @@
     freeifaddrs;
     fseeko64;
     fsetpos64;
+    funopen64;
     getgrgid_r;
     getgrnam_r;
     getifaddrs;