diff --git a/docs/spec/narrowing.rst b/docs/spec/narrowing.rst
index a30b91b1..3d6198c0 100644
--- a/docs/spec/narrowing.rst
+++ b/docs/spec/narrowing.rst
@@ -1,9 +1,13 @@
+.. _`type-narrowing`:
+
 Type narrowing
 ==============
 
 Type checkers should narrow the types of expressions in
 certain contexts. This behavior is currently largely unspecified.
 
+.. _`typeguard`:
+
 TypeGuard
 ---------