Compile error with QT 3.0.5

[Jakob Simon-Gaarde]

I am trying to compile Gideon with QT 3.0.5 but I seem to have trouble with 
the doctreeview part. 

librarydocdlgbase.h:17: forward declaration of `class KLineEdit'
librarydocdlgbase.cpp:51: no matching function for call to
`QHBoxLayout::addWidget (KLineEdit *&)'
/usr/local/qt-3.0.5/include/qlayout.h:378: candidates are: void 
QBoxLayout::addWidget (QWidget *, int =
0, int = 0)

Seems like KLineEdit* can't be casted to QWidget* 

Has anybody else experienced this problem?
-- 
/ Jakob Simon-Gaarde