diff --git a/tests/performance_tests/main.cpp b/tests/performance_tests/main.cpp
index d1b79d026..faf87f9de 100644
--- a/tests/performance_tests/main.cpp
+++ b/tests/performance_tests/main.cpp
@@ -84,7 +84,7 @@ int main(int argc, char** argv)
 
   po::options_description desc_options("Command line options");
   const command_line::arg_descriptor<std::string> arg_filter = { "filter", "Regular expression filter for which tests to run" };
-  command_line::add_arg(desc_options, arg_filter, "");
+  command_line::add_arg(desc_options, arg_filter);
 
   po::variables_map vm;
   bool r = command_line::handle_error_helper(desc_options, [&]()