--- a/faq.xml
+++ b/faq.xml
@@ -83,7 +83,8 @@
     <dd>CMUCL is the fastest option for Maxima on platforms where it is available. Unfortunately, it does not include readline support. However, readline support can be added by wrapping maxima with the <a href="ftp://ftp.inria.fr/INRIA/Projects/cristal/Daniel.de_Rauglaudre/Tools/">ledit</a>. Maxima will build with CMUCL 18c, but will hang on some run-time operations. 18d is known to work.</dd>
 
     <dt><a href="http://savannah.gnu.org/projects/gcl/">GCL</a></dt>
-    <dd>2.4.4 and 2.5.0 should work. 2.5.0 has not yet been released as of this writing. The cvs version of 2.5.0 has been used to successfully build Maxima. GCL versions starting with 2.4.3 can be built with readline support, so Maxima will have advanced command-line editing facilities when build with it.</dd>
+    <dd><!--2.4.4 and 2.5.0 should work. 2.5.0 has not yet been released as of this writing. The cvs version of 2.5.0 has been used to successfully build Maxima. -->GCL versions starting with 2.4.3 can be built with readline support, so Maxima will have advanced command-line editing facilities when build with it.
+    <p><em>N.B. Building GCL could be tricky. Also you may need the CVS code instead of tarball releases.</em></p></dd>
 </dl>
 
 <p><em>See also <a href="http://maxima.sourceforge.net/lisp.html">http://maxima.sourceforge.net/lisp.html</a>.</em></p>