Add header guard
diff --git a/test/cpp/util/service_describer.h b/test/cpp/util/service_describer.h
index 05de5fe..02c58e8 100644
--- a/test/cpp/util/service_describer.h
+++ b/test/cpp/util/service_describer.h
@@ -31,6 +31,9 @@
*
*/
+#ifndef GRPC_TEST_CPP_UTIL_SERVICE_DESCRIBER_H
+#define GRPC_TEST_CPP_UTIL_SERVICE_DESCRIBER_H
+
#include <grpc++/support/config.h>
#include "test/cpp/util/config_grpc_cli.h"
@@ -50,3 +53,5 @@
} // namespase testing
} // namespace grpc
+
+#endif // GRPC_TEST_CPP_UTIL_SERVICE_DESCRIBER_H