diff --git a/docs/spec/narrowing.rst b/docs/spec/narrowing.rst
index b7c6cc0d9..27094e94c 100644
--- a/docs/spec/narrowing.rst
+++ b/docs/spec/narrowing.rst
@@ -110,6 +110,8 @@ is not narrowed in the negative case.
             reveal_type(val)  # tuple[str, str]
             ...
 
+.. _`typeis`:
+
 TypeIs
 ------