diff --git a/doc/src/sgml/pgbuffercache.sgml b/doc/src/sgml/pgbuffercache.sgml
index f379be2..b261a4d 100644
--- a/doc/src/sgml/pgbuffercache.sgml
+++ b/doc/src/sgml/pgbuffercache.sgml
@@ -82,7 +82,7 @@
       <entry><type>smallint</type></entry>
       <entry></entry>
       <entry>Fork number within the relation;  see
-      <filename>include/storage/relfilenode.h</></entry>
+      <filename>include/common/relpath.h</></entry>
      </row>
 
      <row>