diff --git a/docs/api.rst b/docs/api.rst
index a8acd3382..22e81af7a 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -498,6 +498,7 @@ Functions
 .. doxygenfunction:: z_publisher_delete
 .. doxygenfunction:: z_undeclare_publisher
 .. doxygenfunction:: z_publisher_keyexpr
+.. doxygenfunction:: z_publisher_id
 
 .. doxygenfunction:: z_publisher_null
 .. doxygenfunction:: z_publisher_loan