diff --git a/src/tools/backend/backend_dirs.html b/src/tools/backend/backend_dirs.html
index 3ef940f0ca1c377b65b42bf0adef6edf7f23d53a..c5bd3a52fe2919236bc4be0e36dae453f9ad7aed 100644
--- a/src/tools/backend/backend_dirs.html
+++ b/src/tools/backend/backend_dirs.html
@@ -9,6 +9,11 @@ PostgreSQL Backend Directories
by Bruce Momjian
+
+
+Click on any of the section headings to see the source code for that section.
+
+