--- a/scripts/control/moddemo.m
+++ b/scripts/control/moddemo.m
@@ -15,11 +15,18 @@
 # You should have received a copy of the GNU General Public License 
 # along with Octave; see the file COPYING.  If not, write to the Free 
 # Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. 
+
+## -*- texinfo -*-
+## @deftypefn {Function File } { outputs =} moddemo ( inputs ) 
+## @format
+##  Octave Controls toolbox demo: Model Manipulations demo
+##  Written by David Clem August 15, 1994
+## 
+## @end format
+## @end deftypefn
  
 function moddemo()
-# Octave Controls toolbox demo: Model Manipulations demo
 # Written by David Clem August 15, 1994
-
 # a s hodel: updated to reflect updated output order in ss2zp
 
   while (1)