diff -up tcsh-6.17.00/tw.color.c_old tcsh-6.17.00/tw.color.c
--- tcsh-6.17.00/tw.color.c_old	2009-07-20 14:35:59.000000000 +0200
+++ tcsh-6.17.00/tw.color.c	2009-07-20 14:36:54.000000000 +0200
@@ -86,6 +86,7 @@ static Variable variables[] = {
     VAR(NOS, "ow", ""),		/* Other writable dir (o+w) but not sticky */
     VAR(NOS, "st", ""),		/* Sticky dir (+t) but not other writable */
     VAR(NOS, "rs", "0"),	/* Reset to normal color */
+    VAR(NOS, "ca", ""),		/* file with capability */
 };
 
 enum FileType {