diff --git a/test/rs/src/bin/test_client.rs b/test/rs/src/bin/test_client.rs
index 29b5b88..8016ca6 100644
--- a/test/rs/src/bin/test_client.rs
+++ b/test/rs/src/bin/test_client.rs
@@ -65,7 +65,7 @@
         (@arg host: --host +takes_value "Host on which the Thrift test server is located")
         (@arg port: --port +takes_value "Port on which the Thrift test server is listening")
         (@arg transport: --transport +takes_value "Thrift transport implementation to use (\"buffered\", \"framed\")")
-        (@arg protocol: --protocol +takes_value "Thrift protocol implementation to use (\"binary\", \"compact\")")
+        (@arg protocol: --protocol +takes_value "Thrift protocol implementation to use (\"binary\", \"compact\", \"multi\", \"multic\")")
         (@arg testloops: -n --testloops +takes_value "Number of times to run tests")
     )
         .get_matches();