diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml
index 1496ab3210..fbd5311340 100644
--- a/doc/src/sgml/config.sgml
+++ b/doc/src/sgml/config.sgml
@@ -8858,7 +8858,7 @@ dynamic_library_path = 'C:\tools\postgresql;H:\my_project\lib;$libdir'
       </listitem>
      </varlistentry>
 
-     <varlistentry>
+     <varlistentry id="guc-trace-locks" xreflabel="trace_locks">
       <term><varname>trace_locks</varname> (<type>boolean</type>)
       <indexterm>
        <primary><varname>trace_locks</varname> configuration parameter</primary>
@@ -8899,7 +8899,7 @@ LOG:  CleanUpLock: deleting: lock(0xb7acd844) id(24688,24696,0,0,0,1)
       </listitem>
      </varlistentry>
 
-     <varlistentry>
+     <varlistentry id="guc-trace-lwlocks" xreflabel="trace_lwlocks">
       <term><varname>trace_lwlocks</varname> (<type>boolean</type>)
       <indexterm>
        <primary><varname>trace_lwlocks</varname> configuration parameter</primary>
@@ -8919,7 +8919,7 @@ LOG:  CleanUpLock: deleting: lock(0xb7acd844) id(24688,24696,0,0,0,1)
       </listitem>
      </varlistentry>
 
-     <varlistentry>
+     <varlistentry id="guc-trace-userlocks" xreflabel="trace_userlocks">
       <term><varname>trace_userlocks</varname> (<type>boolean</type>)
       <indexterm>
        <primary><varname>trace_userlocks</varname> configuration parameter</primary>
@@ -8938,7 +8938,7 @@ LOG:  CleanUpLock: deleting: lock(0xb7acd844) id(24688,24696,0,0,0,1)
       </listitem>
      </varlistentry>
 
-     <varlistentry>
+     <varlistentry id="guc-trace-lock-oidmin" xreflabel="trace_lock_oidmin">
       <term><varname>trace_lock_oidmin</varname> (<type>integer</type>)
       <indexterm>
        <primary><varname>trace_lock_oidmin</varname> configuration parameter</primary>
@@ -8957,7 +8957,7 @@ LOG:  CleanUpLock: deleting: lock(0xb7acd844) id(24688,24696,0,0,0,1)
       </listitem>
      </varlistentry>
 
-     <varlistentry>
+     <varlistentry id="guc-trace-lock-table" xreflabel="trace_lock_table">
       <term><varname>trace_lock_table</varname> (<type>integer</type>)
       <indexterm>
        <primary><varname>trace_lock_table</varname> configuration parameter</primary>
@@ -8975,7 +8975,7 @@ LOG:  CleanUpLock: deleting: lock(0xb7acd844) id(24688,24696,0,0,0,1)
       </listitem>
      </varlistentry>
 
-     <varlistentry>
+     <varlistentry id="guc-debug-deadlocks" xreflabel="debug_deadlocks">
       <term><varname>debug_deadlocks</varname> (<type>boolean</type>)
       <indexterm>
        <primary><varname>debug_deadlocks</varname> configuration parameter</primary>
@@ -8994,7 +8994,7 @@ LOG:  CleanUpLock: deleting: lock(0xb7acd844) id(24688,24696,0,0,0,1)
       </listitem>
      </varlistentry>
 
-     <varlistentry>
+     <varlistentry id="guc-log-btree-build-stats" xreflabel="log_btree_build_stats">
       <term><varname>log_btree_build_stats</varname> (<type>boolean</type>)
       <indexterm>
        <primary><varname>log_btree_build_stats</varname> configuration parameter</primary>