#include "ControlAboutlyx.h"
#include "forms/form_aboutlyx.h"
#include "xforms_helpers.h"
-#include "Lsstream.h"
+#include "support/std_sstream.h"
#include "version.h"
#include "lyx_forms.h"
+using std::ostringstream;
+
+
namespace {
#if FL_VERSION == 0 || (FL_REVISION == 0 && FL_FIXLEVEL < 2)