diff --git a/src/dsp/afsk1200/cafsk12.cpp b/src/dsp/afsk1200/cafsk12.cpp
index 8da2cdf..6da968e 100644
--- a/src/dsp/afsk1200/cafsk12.cpp
+++ b/src/dsp/afsk1200/cafsk12.cpp
@@ -18,7 +18,7 @@
  *
  *      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.
+ *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 #include <QDebug>
 #include <QTime>
diff --git a/src/dsp/afsk1200/cafsk12.h b/src/dsp/afsk1200/cafsk12.h
index e0bd198..7796514 100644
--- a/src/dsp/afsk1200/cafsk12.h
+++ b/src/dsp/afsk1200/cafsk12.h
@@ -18,7 +18,7 @@
  *
  *      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.
+ *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 #ifndef CAFSK12_H
 #define CAFSK12_H
diff --git a/src/dsp/afsk1200/filter.h b/src/dsp/afsk1200/filter.h
index 0155449..1c1b7d8 100644
--- a/src/dsp/afsk1200/filter.h
+++ b/src/dsp/afsk1200/filter.h
@@ -16,7 +16,7 @@
  *
  *      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.
+ *      Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 /* ---------------------------------------------------------------------- */