Appcode cannot find declaration of #include with folder structure

I have c++ files that has includes like this:

#include <action-broker/ActionBrokerSystem.h>

Appcode is highlighting 

ActionBrokerSystem.h

in red and the error says "Cannot find 'ActionBrokerSystem.h'"

So in my code, wherever I am using the ActionBrokerSystem, it is in red or underlined with errors. 

AppCode suggestion suggests to import ActionBrokerSystem.h, and if i press enter, it adds this line:

#include "ActionBrokerSystem.h"

I can't go around changing this everywhere in the existing projects and also, it doesn't make sense not to use the folder structure.

This works fine in XCode, but I would really like to use AppCode so it would be great if someone knows a fix for this.

Thanks.