--- a/inst/@galois/filter.m
+++ b/inst/@galois/filter.m
@@ -82,7 +82,7 @@
 
 function varargout = filter (varargin)
 
-  varargout = cell (1, max(1, nargout));
+  varargout = cell (1, max (1, nargout));
   [varargout{:}] = gfilter (varargin{:});
 
 endfunction