diff --git a/data/c.m4 b/data/c.m4
index e2656234..1eca2e92 100644
--- a/data/c.m4
+++ b/data/c.m4
@@ -44,12 +44,7 @@ m4_define([b4_copyright],
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-/* As a special exception, when this file is copied by Bison into a
-   Bison output file, you may use that output file without restriction.
-   This special exception was added by the Free Software Foundation
-   in version 1.24 of Bison.  */])
+   Boston, MA 02111-1307, USA.  */])
 
 
 ## ------------ ##