diff --git a/web/viewer.html b/web/viewer.html
index 116201242..d1072cd5f 100644
--- a/web/viewer.html
+++ b/web/viewer.html
@@ -13,6 +13,9 @@ distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
+
+Adobe CMap resources are covered by their own copyright and license:
+http://sourceforge.net/adobe/cmap/wiki/License/
-->