's' is displayed instead of 'σ'

[babygal]

I wrote the following code to display 'σ' in my UI menu. But, instead 's' is shown in the UI menu.

Code :

private:
QMenu *visualsMenu;
QAction *visualsRadiusAct;
 
void createActions();
void createMenus();
 
void myClass::createActions()
{
 visualsRadiusAct = new QAction(tr("&σ"), this);
 }
void myClass::createMenus()
{
 visualsMenu = menuBar()->addMenu(tr("&Visuals"));
 visualsMenu->addAction(visualsRadiusAct);
 }

private:
QMenu *visualsMenu;
QAction *visualsRadiusAct;

void createActions();
void createMenus();

void myClass::createActions()
{
 visualsRadiusAct = new QAction(tr("&σ"), this);
 }
void myClass::createMenus()
{
 visualsMenu = menuBar()->addMenu(tr("&Visuals"));
 visualsMenu->addAction(visualsRadiusAct);
 }

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