Building qwt-6.1.3 with Qt-5.13

I have installed Qt-5.13 and I think I need to rebuild qwt with this version of Qt. But when I execute 'qmake qwt.pro' with Qt5's qmake, then 'make', I get:

$ make
cd src/ && ( test -e Makefile || /usr/lib/x86_64-linux-gnu/qt5/bin/qmake /home/gib/qwt-6.1.3/src/src.pro -o Makefile ) && make -f Makefile
Project ERROR: Unknown module(s) in QT: svg
Makefile:44: recipe for target 'sub-src-make_first-ordered' failed
make: *** [sub-src-make_first-ordered] Error 3

Can qwt be built with Qt5? If so, what do I need to do?

Thanks
Gib

Edit: Apologies - I see that I can build without SVG support by commenting out 'QWT_CONFIG += QwtSvg' in qwtconfig.pri. Now it builds.