Include files and clangd

Imagine this project structure:

ProjectFolder/src/main.cpp

ProjectFolder/include/main.hpp

When I try to

#include main.hpp

The neovim says that 'main.hpp' file not found.

But since that I have the include directories specified in cmake, all goes alright.

Does anyone know how to remove this annoying error in neovim? So something that I can do to specify to clangd where is my include directory?