diff --git a/BibTool.spec b/BibTool.spec
index e14a75d..4f7cb35 100644
--- a/BibTool.spec
+++ b/BibTool.spec
@@ -6,7 +6,7 @@ Group:          Applications/Publishing
 Source:         ftp://ftp.dante.de/tex-archive/biblio/bibtex/utils/bibtool/BibTool-%{version}.tar.gz
 URL:            http://www.gerd-neugebauer.de/software/TeX/BibTool.en.html
 Patch0:         BibTool-2.48-regex_DESTDIR.patch
-License:        GPL
+License:        GPL+
 BuildRequires:  tetex-latex
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)