diff --git a/lib/csharp/src/Protocol/TBinaryProtocol.cs b/lib/csharp/src/Protocol/TBinaryProtocol.cs
index 14ca43b..4b3980e 100644
--- a/lib/csharp/src/Protocol/TBinaryProtocol.cs
+++ b/lib/csharp/src/Protocol/TBinaryProtocol.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TField.cs b/lib/csharp/src/Protocol/TField.cs
index 485c994..fa10584 100644
--- a/lib/csharp/src/Protocol/TField.cs
+++ b/lib/csharp/src/Protocol/TField.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TList.cs b/lib/csharp/src/Protocol/TList.cs
index dbc5c40..a651eb1 100644
--- a/lib/csharp/src/Protocol/TList.cs
+++ b/lib/csharp/src/Protocol/TList.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TMap.cs b/lib/csharp/src/Protocol/TMap.cs
index 8b53f89..5c8d650 100644
--- a/lib/csharp/src/Protocol/TMap.cs
+++ b/lib/csharp/src/Protocol/TMap.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TMessage.cs b/lib/csharp/src/Protocol/TMessage.cs
index 8cb6e0b..8e96da5 100644
--- a/lib/csharp/src/Protocol/TMessage.cs
+++ b/lib/csharp/src/Protocol/TMessage.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TProtocol.cs b/lib/csharp/src/Protocol/TProtocol.cs
index acf9c1b..27c7dc1 100644
--- a/lib/csharp/src/Protocol/TProtocol.cs
+++ b/lib/csharp/src/Protocol/TProtocol.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TProtocolException.cs b/lib/csharp/src/Protocol/TProtocolException.cs
index 9c25047..d570bb8 100644
--- a/lib/csharp/src/Protocol/TProtocolException.cs
+++ b/lib/csharp/src/Protocol/TProtocolException.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TProtocolFactory.cs b/lib/csharp/src/Protocol/TProtocolFactory.cs
index ae976ac..ebc7367 100644
--- a/lib/csharp/src/Protocol/TProtocolFactory.cs
+++ b/lib/csharp/src/Protocol/TProtocolFactory.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TProtocolUtil.cs b/lib/csharp/src/Protocol/TProtocolUtil.cs
index 57cef0e..82cd3e3 100644
--- a/lib/csharp/src/Protocol/TProtocolUtil.cs
+++ b/lib/csharp/src/Protocol/TProtocolUtil.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TSet.cs b/lib/csharp/src/Protocol/TSet.cs
index ac73992..aff7f65 100644
--- a/lib/csharp/src/Protocol/TSet.cs
+++ b/lib/csharp/src/Protocol/TSet.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TStruct.cs b/lib/csharp/src/Protocol/TStruct.cs
index 0cac273..37d1106 100644
--- a/lib/csharp/src/Protocol/TStruct.cs
+++ b/lib/csharp/src/Protocol/TStruct.cs
@@ -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.
  */
 
 using System;
diff --git a/lib/csharp/src/Protocol/TType.cs b/lib/csharp/src/Protocol/TType.cs
index c2d78ed..efc7bef 100644
--- a/lib/csharp/src/Protocol/TType.cs
+++ b/lib/csharp/src/Protocol/TType.cs
@@ -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.
  */
 
 using System;