FTBFS: error: variable 'QNetworkProxy proxy' has initializer but incomplete type

make[1]: Entering directory `/build/buildd/cutycapt-0.0~svn6'
g++ -c -pipe -O2 -D_REENTRANT -Wall -W -DQT_NO_DEBUG -DQT_WEBKIT_LIB -DQT_SVG_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtNetwork -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtSvg -I/usr/include/qt4/QtWebKit -I/usr/include/qt4 -I. -o CutyCapt.o CutyCapt.cpp
CutyCapt.cpp: In function 'int main(int, char**)':
CutyCapt.cpp:503:21: error: variable 'QNetworkProxy proxy' has initializer but incomplete type
       QNetworkProxy proxy = QNetworkProxy(QNetworkProxy::HttpProxy,
                     ^
CutyCapt.cpp:503:43: error: incomplete type 'QNetworkProxy' used in nested name specifier
       QNetworkProxy proxy = QNetworkProxy(QNetworkProxy::HttpProxy,
                                           ^
CutyCapt.cpp:504:57: error: invalid use of incomplete type 'class QNetworkProxy'
         p.host(), p.port(80), p.userName(), p.password());
                                                         ^
In file included from /usr/include/qt4/QtWebKit/qgraphicswebview.h:24:0,
                 from /usr/include/qt4/QtWebKit/QtWebKit:3,
                 from CutyCapt.cpp:22:
/usr/include/qt4/QtWebKit/qwebpage.h:36:7: error: forward declaration of 'class QNetworkProxy'
 class QNetworkProxy;
       ^
make[1]: *** [CutyCapt.o] Error 1
make[1]: Leaving directory `/build/buildd/cutycapt-0.0~svn6'
dh_auto_build: make -j1 returned exit code 2
make: *** [build] Error 25
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20140131-0434
FAILED [dpkg-buildpackage died]

Full log at https://launchpadlibrarian.net/164415282/buildlog_ubuntu-trusty-i386.cutycapt_0.0~svn6-3_FAILEDTOBUILD.txt.gz