diff --git a/matlab/utilities/general/isquare.m b/matlab/utilities/general/isquare.m
index 693417c35..edd2ad1ab 100644
--- a/matlab/utilities/general/isquare.m
+++ b/matlab/utilities/general/isquare.m
@@ -1,28 +1,14 @@
 function info = isquare(A)
 
-%@info:
-%! @deftypefn {Function File} {@var{info} =} isquare (@var{A})
-%! @anchor{isquare}
-%! @sp 1
-%! Tests if @var{A} is square matrix.
-%! @sp 2
-%! @strong{Inputs}
-%! @sp 1
-%! @table @ @var
-%! @item A
-%! Matlab's array.
-%! @end table
-%! @sp 2
-%! @strong{Outputs}
-%! @sp 1
-%! @table @ @var
-%! @item info
-%! Integer scalar equal to 1 if @var{A} is a square matrix, 0 otherwise.
-%! @end table
-%! @end deftypefn
-%@eod:
+% Returns true iff A is a square matrix.
+%
+% INPUTS
+% - A       [double]     matrix.
+%
+% OUTPUTS
+% - info    [logical]
 
-% Copyright (C) 2013-2014 Dynare Team
+% Copyright (C) 2013-2018 Dynare Team
 %
 % This file is part of Dynare.
 %
@@ -39,7 +25,7 @@ function info = isquare(A)
 % You should have received a copy of the GNU General Public License
 % along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
 
-info = 0;
-if isequal(ndims(A),2) && isequal(size(A,1),size(A,2))
-    info = 1;
+info = false;
+if ismatrix(A) && isequal(size(A, 1), size(A, 2))
+    info = true;
 end
\ No newline at end of file