@ -199,7 +199,7 @@ int main(int argc, char** argv) {
address = match[3];
if (!match[4].str().empty())
port = std::stoi(match[4]);
std::regex nickname_re("^[a-zA-Z0-9._- ]+$");
std::regex nickname_re("^[a-zA-Z0-9._\\- ]+$");
if (!std::regex_match(nickname, nickname_re)) {
std::cout
<< "Nickname is not valid. Must be 4 to 20 alphanumeric characters.\n";