diff --git a/doc/src/sgml/libpgtcl.sgml b/doc/src/sgml/libpgtcl.sgml
index eb7714bfbc9..3bebbc327f8 100644
--- a/doc/src/sgml/libpgtcl.sgml
+++ b/doc/src/sgml/libpgtcl.sgml
@@ -67,6 +67,7 @@
pg_execute
send a query and optionally loop over the results
+
pg_listen
establish a callback for NOTIFY messages