diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 489184a4f04..5804069e6a3 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -19007,7 +19007,7 @@ SELECT JSON_VALUE(jsonb '[1,2]', 'strict $[*]' DEFAULT 1 ON ERROR);
     <listitem>
      <para>
        Defines whether to wrap a returned sequence of <acronym>SQL/JSON</acronym>
-       items into a <acronym>SQL/JSON</acronym> array.
+       items into an <acronym>SQL/JSON</acronym> array.
      </para>
        <variablelist>
         <varlistentry>
@@ -19819,7 +19819,7 @@ JSON_SERIALIZE (
      <title>Description</title>
 
      <para>
-      The <function>JSON_SERIALIZE</function> function transforms a SQL/JSON value
+      The <function>JSON_SERIALIZE</function> function transforms an SQL/JSON value
       into a character or binary string.
      </para>
     </sect5>
diff --git a/doc/src/sgml/ref/select.sgml b/doc/src/sgml/ref/select.sgml
index 16bbab52c3e..8e5b83dfded 100644
--- a/doc/src/sgml/ref/select.sgml
+++ b/doc/src/sgml/ref/select.sgml
@@ -1715,7 +1715,7 @@ SELECT * FROM (SELECT * FROM mytable FOR UPDATE) ss ORDER BY column1;
    <para>
     At the <literal>REPEATABLE READ</literal> or <literal>SERIALIZABLE</literal>
     transaction isolation level this would cause a serialization failure (with
-    a <literal>SQLSTATE</literal> of <literal>'40001'</literal>), so there is
+    an <literal>SQLSTATE</literal> of <literal>'40001'</literal>), so there is
     no possibility of receiving rows out of order under these isolation levels.
    </para>
   </caution>
diff --git a/doc/src/sgml/xfunc.sgml b/doc/src/sgml/xfunc.sgml
index a34723030b0..fb8255f136e 100644
--- a/doc/src/sgml/xfunc.sgml
+++ b/doc/src/sgml/xfunc.sgml
@@ -445,7 +445,7 @@ $$ LANGUAGE SQL;
 
     <para>
      If the final <literal>SELECT</literal> or <literal>RETURNING</literal>
-     clause in a <acronym>SQL</acronym> function does not return exactly
+     clause in an <acronym>SQL</acronym> function does not return exactly
      the function's declared result
      type, <productname>PostgreSQL</productname> will automatically cast
      the value to the required type, if that is possible with an implicit