With QT 4.1, I'm trying to connect a signal from a worker thread (child of QThread) to a slot in a class which is a child of QWidget and pass a QStringList as the argument:

Qt Code: 
  1. connect(m_workerThread, SIGNAL(setSystemUserNames(const QStringList&)),
  2. 			this, SLOT(setSystemUserNames(const QStringList&)));
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But when I run the program I get this error message and the connection isn't established:

QObject::connect: Cannot queue arguments of type 'QStringList'
Both methods in m_workerThread and the GUI class are defined as:

Qt Code: 
  1. void setSystemUserNames(const QStringList& userNames);
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I've tried changing it to simply "QStringList userNames" (so, not const&), but still get the same warning. Am I missing something? Any idea?