diff --git a/functions/dba.xml b/functions/dba.xml
index df9f4d34b4..d108c373b1 100644
--- a/functions/dba.xml
+++ b/functions/dba.xml
@@ -10,7 +10,7 @@
    <para>
     This is a general abstraction layer for several file-based databases. As
     such, functionality is limited to a subset of features modern databases
-    such as <ulink url="">Sleepycat Software's DB2</ulink>
+    such as <ulink url="&url.sleepycat;">Sleepycat Software's DB2</ulink>
     support. (This is not to be confused with IBM's DB2 software, which is
     supported through the <link linkend="ref.odbc">ODBC functions</link>.)</para>
 
@@ -35,10 +35,10 @@
       arbitrary limits of dbm (therefore it is deprecated).</simpara></listitem>
 
      <listitem><simpara>
-      gdbm is the <ulink url="">GNU database manager</ulink>.</simpara></listitem>
+      gdbm is the <ulink url="&url.gdbm;">GNU database manager</ulink>.</simpara></listitem>
 
      <listitem><simpara>
-      db2 is <ulink url="">Sleepycat Software's DB2</ulink>. It
+      db2 is <ulink url="&url.sleepycat;">Sleepycat Software's DB2</ulink>. It
       is described as "a programmatic toolkit that provides high-performance
       built-in database support for both standalone and client/server
       applications."</simpara></listitem>
@@ -46,7 +46,7 @@
      <listitem><simpara>
       cdb is "a fast, reliable, lightweight package for creating and reading
       constant databases." It is from the author of qmail and can be found
-      <ulink url="">here</ulink>. Since it is constant, we support
+      <ulink url="&url.cdb;">here</ulink>. Since it is constant, we support
       only reading operations.</simpara></listitem>
 
     </itemizedlist></para>