diff --git a/Doxyfile.in b/Doxyfile.in
index ef19db81..fa3c1e1d 100644
--- a/Doxyfile.in
+++ b/Doxyfile.in
@@ -1,7 +1,7 @@
 # Doxyfile 1.4.7
 
 # Copyright (C) 1997-2007 by Dimitri van Heesch
-# License: GNU GPLv2
+# License: GNU GPLv2+
 
 # This file describes the settings to be used by the documentation system
 # doxygen (www.doxygen.org) for a project