Cannot hide QTableWidget's vertical header.

I am trying to hide the vertical header of a QTableWidget but I get error.
What I learned from all similar questions is that I need to use

Code:

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tableWidget->verticalHeader()->setVisible(false);

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But I get the following error:

Code:

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error: invalid use of incomplete type 'class QHeaderView'
tableWidget->verticalHeader()->setVisible(false);

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I am using Qt 5.2

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Added after 39 minutes:

Solved it using

Code:

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vh=new QHeaderView(Qt::Vertical);
    vh->hide();
    tableWidget->setVerticalHeader(vh);

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incomplete type means that the compiler does not know any details about the class QHeaderView, it just knows that it exists, but not which methods it has.

Include the header for the class.

Code:

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#include <QHeaderView>

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Cheers,
_

That is a cleaner way you post it......sorry I mistakenly included QTableView instead of QHeaderView