compilation error when disable deprecated before 5.2

When compiling a file including qserialport.h with #define QT_DISABLE_DEPRECATED_BEFORE=QT_VERSION, the following error occur:

include\QtSerialPort/qserialport.h:258:46: error: 'QSerialPort::DataErrorPolicy' has not been declared
void dataErrorPolicyChanged(QSerialPort::DataErrorPolicy policy);

This is because the signal "void dataErrorPolicyChanged(QSerialPort::DataErrorPolicy policy);" is not protected by "#if QT_DEPRECATED_SINCE(5, 2)", contrary to "enum DataErrorPolicy"