Hi Nicolas, Are you using Custom in an attempt to silent rpmlint ? Yes, it does work, rpmlint is happy. I got this suggestion during the package review. My first draft had License Tag: "Redistributable, with restrictions" The complete license text is at http://www.iro.umontreal.ca/~simardr/testu01 /copyright.html It's in fact pretty short. Here it's for you convenience: =================================================================== Redistribution and use in source and binary forms, with or without modification, are permitted without a fee for private, research, academic, or other non-commercial purposes. Any use of this software by a commercial enterprise requires a written licence from the copyright owner. Any changes made to this package must be clearly identified as such. In scientific publications which used this software, one may give the citation as: P. L'Ecuyer and R. Simard, *TestU01: A C Library for Empirical Testing of Random Number Generators*, ACM Transactions on Mathematical Software, Vol. 33, 4, article 22, 2007. Redistributions of source code must retain this copyright notice and the following disclaimer. THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. =================================================================== The software is free (like a speech) for private, research, academic, or other non-commercial purposes. I have contacted author of the package, prof. P. L'Ecuyer, to clarify the license status. He has stated that the university he works for would like to retain a right to get license fees in case that software is used commercially. Could you please suggest a suitable license tag for this particular case? Thanks a lot Jirka