diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml
index e5cab37..75a4d51 100644
--- a/doc/src/sgml/libpq.sgml
+++ b/doc/src/sgml/libpq.sgml
@@ -6957,7 +6957,7 @@
The Connection Service File
at ~/.pg_service.conf or the location
specified by the environment variable PGSERVICEFILE,
or it can be a system-wide file
- at /etc/pg_service.conf or in the directory
+ at `pg_config --sysconfdir`/pg_service.conf or in the directory
specified by the environment variable
PGSYSCONFDIR. If service definitions with the same
name exist in the user and the system file, the user file takes