diff --git a/lib/cpp/test/JSONProtoTest.cpp b/lib/cpp/test/JSONProtoTest.cpp
index fedf99e..b96638e 100644
--- a/lib/cpp/test/JSONProtoTest.cpp
+++ b/lib/cpp/test/JSONProtoTest.cpp
@@ -48,7 +48,7 @@
   ooe->some_characters = "JSON THIS! \"\1";
   ooe->zomg_unicode = "\xd7\n\a\t";
   ooe->base64 = "\1\2\3\255";
-  ooe->rfc4122_uuid = "00000000-0000-0000-0000-000000000000";
+  ooe->rfc4122_uuid = apache::thrift::TUuid{"00000000-0000-0000-0000-000000000000"};
 }
 
 BOOST_AUTO_TEST_CASE(test_json_proto_1) {
@@ -85,7 +85,7 @@
                                "\xb0\xcf\x81\xe2\x84\x8e\x20\xce\x91\x74\x74"
                                "\xce\xb1\xe2\x85\xbd\xce\xba\xc7\x83\xe2\x80"
                                "\xbc";
-  n->my_ooe.rfc4122_uuid = "5e2ab188-1726-4e75-a04f-1ed9a6a89c4c";
+  n->my_ooe.rfc4122_uuid = apache::thrift::TUuid{"5e2ab188-1726-4e75-a04f-1ed9a6a89c4c"};
   n->my_bonk.type = 31337;
   n->my_bonk.message = "I am a bonk... xor!";
 }