diff -ruN tcsh-6.15.00.orig/tw.color.c tcsh-6.15.00/tw.color.c
--- tcsh-6.15.00.orig/tw.color.c	2006-03-02 19:46:45.000000000 +0100
+++ tcsh-6.15.00/tw.color.c	2008-07-31 14:10:34.000000000 +0200
@@ -85,6 +85,7 @@
     VAR(NOS, "tw", ""),		/* Sticky and other writable dir (+t,o+w) */
     VAR(NOS, "ow", ""),		/* Other writable dir (o+w) but not sticky */
     VAR(NOS, "st", ""),		/* Sticky dir (+t) but not other writable */
+    VAR(NOS, "ca", ""),		/* file with capability */
 };
 
 enum FileType {