diff --git a/lib/rb/lib/thrift.rb b/lib/rb/lib/thrift.rb
index 88562e1..4d4e130 100644
--- a/lib/rb/lib/thrift.rb
+++ b/lib/rb/lib/thrift.rb
@@ -16,6 +16,9 @@
 # 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.
 
 $:.unshift File.dirname(__FILE__)
 
@@ -56,4 +59,4 @@
 require 'thrift/server/threaded_server'
 require 'thrift/server/thread_pool_server'
 
-require 'thrift/thrift_native'
\ No newline at end of file
+require 'thrift/thrift_native'