--- a/ZComb.h
+++ b/ZComb.h
@@ -12,8 +12,10 @@
    GNU General Public License for more details.
    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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+   along with GNU Libtool; see the file COPYING.  If not, a copy
+   can be downloaded from http://www.gnu.org/licenses/gpl.html, or
+   obtained by writing to the Free Software Foundation, Inc.,
+   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
 PANO13_IMPEX void ZCombSetDisabled(void);
 PANO13_IMPEX void ZCombSetEnabled(void);