diff --git a/free-programming-books.md b/free-programming-books.md
index 9c8f7f7eb523abd3e1e0dc0d0a9d4746d902b0d0..4cafa86d2d2740384aa3d1bc0925cb08996bf981 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -144,7 +144,7 @@ Original Source: [Free Programming books](http://stackoverflow.com/revisions/392
 * [QML](#qml)
 * [R](#r)
 * [Racket](#racket)
-* [Raspberry Pi] (#rpi)
+* [Raspberry Pi] (#raspberry-pi)
 * [REBOL](#rebol)
 * [Ruby](#ruby)
     * [RSpec](#rspec)