diff --git a/doc/src/sgml/pgfreespacemap.sgml b/doc/src/sgml/pgfreespacemap.sgml
index 5025498249..0ab3307e9c 100644
--- a/doc/src/sgml/pgfreespacemap.sgml
+++ b/doc/src/sgml/pgfreespacemap.sgml
@@ -9,7 +9,7 @@
 
  <para>
   The <filename>pg_freespacemap</filename> module provides a means for examining the
-  free space map (FSM). It provides a function called
+  <link linkend="storage-fsm">free space map</link> (FSM). It provides a function called
   <function>pg_freespace</function>, or two overloaded functions, to be
   precise. The functions show the value recorded in the free space map for
   a given page, or for all pages in the relation.