diff --git a/matlab/ff1_.m b/matlab/ff1_.m
index f0c2ef94e68b2fd706baa1c6ebeb6a4ff9d2e58c..36dd171bb0dc259ed2585ed1c31a7822b3bd1789 100644
--- a/matlab/ff1_.m
+++ b/matlab/ff1_.m
@@ -1,6 +1,20 @@
-% Copyright (C) 2001 Michel Juillard
-%
 function y=ff1_(x)
+
+% function y=ff1_(x)
+% splits the input argument x into endogenous and exogenous variables and calls the 'static' function
+%
+% INPUTS
+%    x:          argument splitted between endogenous and exogenous
+%        
+% OUTPUTS
+%    y:         'static' function residuals
+%        
+% SPECIAL REQUIREMENTS
+%    none
+%  
+% part of DYNARE, copyright Dynare Team (2001-2008)
+% Gnu Public License.
+
 global it_ M_ oo_
 
 n1 = size(x,1) - M_.exo_nbr;