diff --git a/Doc/using/unix.rst b/Doc/using/unix.rst
index b3e6ced..da4b743 100644
--- a/Doc/using/unix.rst
+++ b/Doc/using/unix.rst
@@ -59,6 +59,8 @@
 of Python are available and can be installed with e.g. ``pkgutil -i python27``.
 
 
+.. _building-python-on-unix:
+
 Building Python
 ===============