Can you elaborate on what you mean? Which files are you seeing the “i” with the wrong capitalization? Is this when you are creating a new project or adding code to a project? Is this occurring in one of the engine source files? If possible, is there a way for me to reproduce what you’re seeing on my end to help me investigate the issue? CorePrivatePCH doesn’t appear to mention ENGINEPRIVATE and the only mention of ENGINEPRIVATE in EnginePrivate.h is inside a comment block. Is this something that you’re adding to these files? Additionally, what is the compile error that you receive? Knowing what the error message is may help identify the problem and how to solve it. Any additional information you can provide to explain what is happening will be helpful.