diff --git a/doc/groups.dox b/doc/groups.dox
--- a/doc/groups.dox
+++ b/doc/groups.dox
@@ -671,8 +671,8 @@
 Some demo programs are listed here. Their full source codes can be found in
 the \c demo subdirectory of the source tree.
 
-It order to compile them, use <tt>--enable-demo</tt> configure option when
-build the library.
+In order to compile them, use the <tt>make demo</tt> or the
+<tt>make check</tt> commands.
 */
 
 /**