diff --git a/test/DebugProtoTest.thrift b/test/DebugProtoTest.thrift
index 4e9fb47..50ae4c1 100644
--- a/test/DebugProtoTest.thrift
+++ b/test/DebugProtoTest.thrift
@@ -20,6 +20,7 @@
 namespace c_glib TTest
 namespace cpp thrift.test.debug
 namespace java thrift.test
+namespace rb thrift.test
 
 struct Doubles {
  1: double nan,