Reverse/Invert Mouse wheel zoom direction in Viewport

Can anyone help identify how to modify the source code in order to reverse the mouse wheel zoom direction in the viewport? (I have tried but cannot get used to ‘scroll up - zoom in, scroll down- zoom out’. Would be great if Epic would include this as an option. Autodesk 3DS Max suffers the same problem, despite most other Autodesk products having this option. So far my request to Epic and Autodesk has not been implemented ).