diff --git a/index.html b/index.html
index 86ba80b04..7cb77b676 100644
--- a/index.html
+++ b/index.html
@@ -50,6 +50,7 @@ March 2012
 | <a href="doc/gf-editor-modes.html">GF Editor Modes</a>
 | <a href="eclipse/index.html">GF Eclipse Plugin</a>
 | <A HREF="doc/gf-lrec-2010.pdf">LibTutorial</A>
+| <a href="http://hackage.haskell.org/packages/archive/gf/3.1.6.2/doc/html/PGF.html">PGF library API</a>
 | <A HREF="http://www.molto-project.eu">MOLTO</A>
 | <A HREF="http://school.grammaticalframework.org">SummerSchool</A>
 | <A HREF="/android/">Android</A>