diff --git a/test/OptionalRequiredTest.thrift b/test/OptionalRequiredTest.thrift
index 67e6f58..8108a7f 100644
--- a/test/OptionalRequiredTest.thrift
+++ b/test/OptionalRequiredTest.thrift
@@ -21,6 +21,7 @@
  * details.
  */
 
+namespace c_glib TTest
 namespace cpp thrift.test
 namespace java thrift.test