Index: head/README
===================================================================
--- head/README	(revision 50517)
+++ head/README	(revision 50518)
@@ -1,10 +1,10 @@
 $FreeBSD$
 
 If you plan on building a local copy of the FreeBSD documentation, or using
 our toolchain in your own projects, please read
 
-    http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/fdp-primer/
+    https://www.FreeBSD.org/doc/en_US.ISO8859-1/books/fdp-primer/
 
 for information about the tools and formatting languages we use.
 Chapter 1 has a Quick Start section, and Chapter 2 covers the software
 and related items in more detail.