diff --git a/matlab/check.m b/matlab/check.m
index 1ca7e34057d1c963c26d7f5f952339b2d533ffae..ccb087530571a0368c0ee9c8ba3d3cccc1aacad3 100644
--- a/matlab/check.m
+++ b/matlab/check.m
@@ -1,7 +1,22 @@
-% Copyright (C) 2001 Michel Juillard
+function result = check
+
+
+% function result = check
+% checks determinacy conditions by computing the eigenvalues
 %
+% INPUTS
+%    none
+%    
+% OUTPUTS
+%    result
+%
+% SPECIAL REQUIREMENTS
+%    none
+%  
+% part of DYNARE, copyright Dynare Team (2001-2007)
+% Gnu Public License.
+
 
-function result = check
 global M_ options_ oo_
 global it_