diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index ca97c03..3611e14 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -1253,6 +1253,7 @@
     catclose;
     catgets;
     catopen;
+    ctermid;
     endgrent;
     endpwent;
     futimes;