diff --git a/lib/st/thrift.st b/lib/st/thrift.st
index 6883539..8675e01 100644
--- a/lib/st/thrift.st
+++ b/lib/st/thrift.st
@@ -15,6 +15,10 @@
 KIND, either express or implied. See the License for the
 specific language governing permissions and limitations
 under the License.
+
+Contains some contributions under the Thrift Software License.
+Please see doc/old-thrift-license.txt in the Thrift distribution for
+details. 
 "
 
 SystemOrganization addCategory: #Thrift!