Qt: Wshadow warning on nested foreach

Question

I enabled the compiler flag "-Wshadow" on a Qt project. Now I get a warning for every nested foreach loop in the project. It seems, that the foreach macro uses an identifier which is duplicated in a nested foreach loop.

Quick example:

QStringList listA, listB;
foreach (QString a, listA) {
    foreach (QString b, listB) {
        qDebug() << a << b;
    }
}

Compiler output:

Test.cpp:46:9: warning: declaration shadows a local variable [-Wshadow]
        foreach (QString b, listB) {
        ^
/usr/include/qt5/QtCore/qglobal.h:911:21: note: expanded from macro 'foreach'
#    define foreach Q_FOREACH
                    ^
/usr/include/qt5/QtCore/qglobal.h:857:47: note: expanded from macro 'Q_FOREACH'
for (QForeachContainer<__typeof__(container)> _container_(container); \
                                              ^
Test.cpp:45:5: note: previous declaration is here
    foreach (QString a, listA) {
    ^
/usr/include/qt5/QtCore/qglobal.h:911:21: note: expanded from macro 'foreach'
#    define foreach Q_FOREACH
                    ^
/usr/include/qt5/QtCore/qglobal.h:857:47: note: expanded from macro 'Q_FOREACH'
for (QForeachContainer<__typeof__(container)> _container_(container); \
                                              ^

Is there a way to enable -Wshadow but suppress the warnings from nested foreach?