diff --git a/pflib.c b/pflib.c
index 64cb2b3..987e110 100644
--- a/pflib.c
+++ b/pflib.c
@@ -6,6 +6,8 @@
  * This work is licensed under the terms of the GNU GPL, version 2.  See
  * the COPYING file in the top-level directory.
  *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
  */
 #include "qemu-common.h"
 #include "console.h"