diff --git a/doc/src/sgml/libpq.sgml b/doc/src/sgml/libpq.sgml
index 4a727d44997..e56c12acfa2 100644
--- a/doc/src/sgml/libpq.sgml
+++ b/doc/src/sgml/libpq.sgml
@@ -9318,7 +9318,8 @@ myEventProc(PGEventId evtId, void *evtInfo, void *passThrough)
   <para>
    The connection service file allows libpq connection parameters to be
    associated with a single service name. That service name can then be
-   specified in a libpq connection string, and the associated settings will be
+   specified using the <literal>service</literal> key word
+   in a libpq connection string, and the associated settings will be
    used. This allows connection parameters to be modified without requiring
    a recompile of the libpq-using application. The service name can also be
    specified using the <envar>PGSERVICE</envar> environment variable.