diff --git a/lang/cem/libcc.ansi/misc/LIST b/lang/cem/libcc.ansi/misc/LIST
index b30737c21..9544baf07 100644
--- a/lang/cem/libcc.ansi/misc/LIST
+++ b/lang/cem/libcc.ansi/misc/LIST
@@ -17,3 +17,4 @@ readdir.c
 rewinddir.c
 seekdir.c
 telldir.c
+isatty.c