diff --git a/doc/src/sgml/backup.sgml b/doc/src/sgml/backup.sgml
index 6812e9ec661..5b147a746de 100644
--- a/doc/src/sgml/backup.sgml
+++ b/doc/src/sgml/backup.sgml
@@ -889,7 +889,7 @@ SELECT pg_backup_start(label => 'label', fast => false);
      regularly scheduled checkpoint to complete, which may take a long time (see the
      configuration parameters <xref linkend="guc-checkpoint-timeout"/> and
      <xref linkend="guc-checkpoint-completion-target"/>).  This is
-     usually preferrable as it minimizes the impact on the running system.  If you
+     usually preferable as it minimizes the impact on the running system.  If you
      want to start the backup as soon as possible, pass <literal>true</literal> as
      the second parameter to <function>pg_backup_start</function> and it will
      request an immediate checkpoint, which will finish as fast as possible using
diff --git a/doc/src/sgml/custom-rmgr.sgml b/doc/src/sgml/custom-rmgr.sgml
index 17a4f1dfbde..dd917c54b62 100644
--- a/doc/src/sgml/custom-rmgr.sgml
+++ b/doc/src/sgml/custom-rmgr.sgml
@@ -19,7 +19,7 @@
   an extension to implement.
  </para>
  <para>
-  To create a new custom WAL resouce manager, first define an
+  To create a new custom WAL resource manager, first define an
   <structname>RmgrData</structname> structure with implementations for the
   resource manager methods. Refer to
   <filename>src/backend/access/transam/README</filename> and