QJSEngine classes not highlighted

QJSEngine, QJSValue etc. not highlighted.

Project compiles and work great, but syntax highlighting didn't work.

QML module is included:

When I try right click on <QJSEngine> and select "Open Document"

I get

After I manually added "$(QTDIR)\include\QtQml" to VS include directories

Syntax highlighting started to work, and "Open document" as well.