I have a class template, templated on type T, which I need to hold as a data value in the class. I use value_initialized for this type T effectively, and the value gets value initialized correctly when the default constructor of my class is used. If, however, I add a second constructor to my class which takes a T, for initializing my 'value_initialized<T> data' value, things do not work as well. Obviously I can still value initialize my data value, as in my default constructor, and then use 'boost::get(data) = arg;' to set the value of my value initialized variable. But this will not work if the type T is a top-level const, whereas I do want to initialize the data value in this case to the T arg passed into my second constructor. Is there a good solution to this which I have overlooked ?