diff --git a/Doc/using/windows.rst b/Doc/using/windows.rst
index 742a290..c85afd2 100644
--- a/Doc/using/windows.rst
+++ b/Doc/using/windows.rst
@@ -82,6 +82,8 @@
 settings in Windows.
 
 
+.. _setting-envvars:
+
 Excursus: Setting environment variables
 ---------------------------------------