Using QWINDOWSIZE_MAX results to warning Unable to set geometry

For instance following settings for main window

setMinimumSize(0, 0);
setMaximumSize(800, QWIDGETSIZE_MAX);

will result on warning

QWindowsWindow::setGeometry: Unable to set geometry 800x1200+18+40 on QWidgetWindow/'SetGeometryDpTestClassWindow'. Resulting geometry: 800x1174+18+40 (frame: 8, 30, 8, 8, custom margin: 0, 0, 0, 0, minimum size: 0x0, maximum size: 800x16777215).

Using values for maximum height up to QWIDGETSIZE_MAX - 1 will work fine. My finding was that on function QWindowsGeometryHint::applyToMinMaxInfo there is a test for

if (maximumHeight < QWINDOWSIZE_MAX)
mmi->ptMaxTrackSize.y = maximumHeight + frameHeight;

which could be cause. Using comparison <= will fix the warning. But is that a correct fix? Anyway the documentation states that values up to QWINDOWSIZE_MAX should work.