--- mdocml-1.14.1/cgi.c.orig	2017-02-21 01:25:20.000000000 +0100
+++ mdocml-1.14.1/cgi.c	2017-02-25 16:28:06.751637253 +0100
@@ -562,9 +562,13 @@
 		 * If we have just one result, then jump there now
 		 * without any delay.
 		 */
+		const char *scheme = "http", *https;
+		if ((https = getenv("HTTPS")) != NULL &&
+		    strcmp(https, "on") == 0)
+			scheme = "https";
 		printf("Status: 303 See Other\r\n");
-		printf("Location: http://%s/%s%s%s/%s",
-		    HTTP_HOST, scriptname,
+		printf("Location: %s://%s/%s%s%s/%s",
+		    scheme, HTTP_HOST, scriptname,
 		    *scriptname == '\0' ? "" : "/",
 		    req->q.manpath, r[0].file);
 		printf("\r\n"