diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 5aac7110b12..e1b353ed940 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -5056,7 +5056,7 @@ ANY <replaceable class="parameter">num_sync</replaceable> ( <replaceable class="
       </term>
       <listitem>
        <para>
-        Enables or disables reordering of keys in <literal>GROUP BY</literal>
+        Enables or disables reordering of keys in a <literal>GROUP BY</literal>
         clause. The default is <literal>on</literal>.
        </para>
       </listitem>
diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index e798d888579..afa0662ffcd 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -1216,7 +1216,7 @@ static struct config_bool ConfigureNamesBool[] =
 	},
 	{
 		{"enable_group_by_reordering", PGC_USERSET, QUERY_TUNING_METHOD,
-			gettext_noop("enable reordering of GROUP BY key"),
+			gettext_noop("Enables reordering of GROUP BY keys."),
 			NULL,
 			GUC_EXPLAIN
 		},