--- a/conf.h.orig	2017-10-01 09:07:44.000000000 +0200
+++ b/conf.h		2018-11-20 18:54:51.484850964 +0100
@@ -12,6 +12,7 @@ static struct filetype {
 	{"mk", "Makefile$|makefile$|\\.mk$"},		/* makefile */
 	{"sh", "\\.sh$"},				/* shell script */
 	{"nm", "\\.nm$"},				/* neatmail */
+	{"sh", ".$"},					/* everything else */
 };
 
 /* syntax highlighting patterns */