QOverload compile failure on OSX 10.11.6

<snip>
cd adueditor/ && ( test -e Makefile || /Users/jc/git_repos/qt5/qtbase/bin/qmake -o Makefile /Users/jc/git_repos/qt5/qtserialbus/examples/serialbus/modbus/adueditor/adueditor.pro -qtconf /Users/jc/git_repos/qt5/qtbase/bin/qt.conf ) && /Applications/Xcode.app/Contents/Developer/usr/bin/make -f Makefile install
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -c -pipe -stdlib=libc++ -g -std=gnu++11 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk -mmacosx-version-min=10.9  -fno-exceptions -Wall -W -fPIC -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_SERIALBUS_LIB -DQT_SERIALPORT_LIB -DQT_NETWORK_LIB -DQT_CORE_LIB -I. -I. -I/Users/jc/git_repos/qt5/qtbase/include -I/Users/jc/git_repos/qt5/qtbase/include/QtWidgets -I/Users/jc/git_repos/qt5/qtbase/include/QtGui -I../../../../include/QtSerialBus/5.8.0 -I../../../../include/QtSerialBus/5.8.0/QtSerialBus -I../../../../include -I../../../../include/QtSerialBus -I/Users/jc/git_repos/qt5/qtserialport/include -I/Users/jc/git_repos/qt5/qtserialport/include/QtSerialPort -I/Users/jc/git_repos/qt5/qtbase/include/QtCore/5.8.0 -I/Users/jc/git_repos/qt5/qtbase/include/QtCore/5.8.0/QtCore -I/Users/jc/git_repos/qt5/qtbase/include/QtNetwork -I/Users/jc/git_repos/qt5/qtbase/include/QtCore -I.moc -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/OpenGL.framework/Headers -I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/System/Library/Frameworks/AGL.framework/Headers -I.uic -I/Users/jc/git_repos/qt5/qtbase/mkspecs/macx-clang -F/Users/jc/git_repos/qt5/qtbase/lib -F/Users/jc/git_repos/qt5/qtserialbus/lib -F/Users/jc/git_repos/qt5/qtserialport/lib -o .obj/modbustcpclient.o modbustcpclient.cpp
In file included from modbustcpclient.cpp:43:
./modbustcpclient_p.h:89:42: error: no matching function for call to 'of'
                   element.timer.data(), QOverload<int>::of(&QTimer::setInterval));
                                         ^~~~~~~~~~~~~~~~~~
/Users/jc/git_repos/qt5/qtbase/include/QtCore/../../src/corelib/global/qglobal.h:1054:34: note: candidate template ignored: couldn't infer template argument 'R'
    static Q_DECL_CONSTEXPR auto of(R (T::*ptr)(Args...)) Q_DECL_NOTHROW -> decltype(ptr)
                                 ^
/Users/jc/git_repos/qt5/qtbase/include/QtCore/../../src/corelib/global/qglobal.h:1066:34: note: candidate template ignored: couldn't infer template argument 'R'
    static Q_DECL_CONSTEXPR auto of(R (T::*ptr)(Args...) const) Q_DECL_NOTHROW -> decltype(ptr)
                                 ^
/Users/jc/git_repos/qt5/qtbase/include/QtCore/../../src/corelib/global/qglobal.h:1083:34: note: candidate template ignored: couldn't infer template argument 'R'
    static Q_DECL_CONSTEXPR auto of(R (*ptr)(Args...)) Q_DECL_NOTHROW -> decltype(ptr)
                                 ^
1 error generated.
make[5]: *** [.obj/modbustcpclient.o] Error 1
make[4]: *** [sub-adueditor-install_subtargets] Error 2
make[3]: *** [sub-modbus-install_subtargets] Error 2
make[2]: *** [sub-serialbus-install_subtargets] Error 2
make[1]: *** [sub-examples-install_subtargets] Error 2
make: *** [module-qtserialbus-install_subtargets] Error 2