diff --git a/doc/src/sgml/pgbuffercache.sgml b/doc/src/sgml/pgbuffercache.sgml
index 3c33a84994e..4eb02c06239 100644
--- a/doc/src/sgml/pgbuffercache.sgml
+++ b/doc/src/sgml/pgbuffercache.sgml
@@ -77,13 +77,6 @@
       <entry>Database OID of the relation</entry>
      </row>
 
-     <row>
-      <entry><structfield>relblocknumber</structfield></entry>
-      <entry><type>bigint</type></entry>
-      <entry></entry>
-      <entry>Page number within the relation</entry>
-     </row>
-
      <row>
       <entry><structfield>relforknumber</structfield></entry>
       <entry><type>smallint</type></entry>
@@ -92,6 +85,13 @@
       <filename>include/storage/relfilenode.h</></entry>
      </row>
 
+     <row>
+      <entry><structfield>relblocknumber</structfield></entry>
+      <entry><type>bigint</type></entry>
+      <entry></entry>
+      <entry>Page number within the relation</entry>
+     </row>
+
      <row>
       <entry><structfield>isdirty</structfield></entry>
       <entry><type>boolean</type></entry>