--- a/fourier/blfilter.m
+++ b/fourier/blfilter.m
@@ -96,7 +96,7 @@
     kv.fc=kv.fc/kv.fs*2;
 else
    %If fs is not specified, allow fsupp to be in range 0-2
-  % assert(all(fsupp>0) && all(fsupp<=2),'%s: Filter support is not valid.',upper(mfilename));
+   assert(all(fsupp>0) && all(fsupp<=2),'%s: Filter support should be in range ]0-2].',upper(mfilename));
 end;
 
 % Sanitize