Fix URL.

diff --git a/README.md b/README.md
index db0bca0f6c25bc3a50d1403e102e360afaa66b03..4ff4b5a781c1fc896785b8257b0ac1d75e2502b0 100644 (file)
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ See http://abyz.co.uk/rpi/pigpio/examples.html.
 
 ## GPIO
 
-ALL GPIO are identified by their Broadcom number.  See elinux.org
+ALL GPIO are identified by their Broadcom number.  See http://elinux.org.
 
 There are 54 GPIO in total, arranged in two banks.