diff -urNb mutt-1.5.11+cvs20060126/hdrline.c mutt-my/hdrline.c
--- mutt-1.5.11+cvs20060126/hdrline.c	2006-02-02 03:55:17.000000000 +0100
+++ mutt-my/hdrline.c	2006-02-18 02:04:18.000000000 +0100
@@ -583,6 +583,18 @@
       *(dest + 1) = 0;
       break;
 
+    case 'R':
+      if (!first_mailing_list (dest, destlen, hdr->env->to) &&
+	  !first_mailing_list (dest, destlen, hdr->env->cc))
+	dest[0] = 0;
+      if (dest[0])
+      {
+	strfcpy (buf2, dest, sizeof(buf2));
+	mutt_format_s (dest, destlen, prefix, buf2);
+	break;
+      }
+      /* fall through if 'R' returns nothing */
+
     case 't':
       buf2[0] = 0;
       if (!check_for_mailing_list (hdr->env->to, "To ", buf2, sizeof (buf2)) &&