diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index a5cd4e44c71..2af34d70478 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -5063,7 +5063,7 @@ 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_tables.c b/src/backend/utils/misc/guc_tables.c
index 87e625aa7a2..550e95056c0 100644
--- a/src/backend/utils/misc/guc_tables.c
+++ b/src/backend/utils/misc/guc_tables.c
@@ -969,7 +969,7 @@ 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
 		},