Hi, in Boost 1.37.0, this program #include <iostream> #include <string> #include <boost/program_options.hpp> int main(int argc, char * argv[]) { using namespace std; using namespace boost::program_options; options_description cmdline_options("Supported options"); cmdline_options.add_options() ("help", "this is a sufficiently long text to require word-wrapping") ("prefix", value<string>()->default_value("/h/proj/tmp/dispatch"), "root path of the dispatch installation") ; cerr << cmdline_options << endl; return 0; } displays a usage message that looks weird: $ g++ foo.cpp -lboost_program_options.a && ./a.out | Supported options: | --help this is a sufficiently long text to requ | ire word-wrapping | --prefix arg (=/h/proj/tmp/dispatch) root path of the dispatch installation It appears that the word-wrapping algorithm can't handle the default argument properly. Is that a known problem? Can I work around that somehow? I also wonder whether it's possible to format the help string such that it's printed in the *next line*, like this: | --prefix arg (=/ridiculously/long/path/that/leaves/no/room/on/right/side) | root path of the dispatch installation I tried adding a '\n' at the beginning of the help string, but that didn't have the desired effect. Is there any way to accomplish this? Take care, Peter