diff --git a/docs/specs/signed-interest.rst b/docs/specs/signed-interest.rst
index 093797a..2319e5a 100644
--- a/docs/specs/signed-interest.rst
+++ b/docs/specs/signed-interest.rst
@@ -1,3 +1,5 @@
+.. _Signed Interest:
+
 Signed Interest
 ===============