diff --git a/doc/src/sgml/plhandler.sgml b/doc/src/sgml/plhandler.sgml
index b82a5da..1162bcf 100644
*** a/doc/src/sgml/plhandler.sgml
--- b/doc/src/sgml/plhandler.sgml
***************
*** 95,101 ****
! This is a template for a procedural-language handler written in C:
#include "postgres.h"
#include "executor/spi.h"
--- 95,104 ----
! This is a template for a procedural-language handler written in C. The
! documentation on C-language functions found in
! applies to language handlers as well as any other C functions, and may be
! helpful to understand some portions of this code.
#include "postgres.h"
#include "executor/spi.h"