Unknown type name 'class'; did you mean 'Class'?

I've just had this exact problem. I had a view controller using the AQRecorder class from AQRecorder.mm. When I included AQRecorder.h in my view controller these errors occurred. It appeared to me because my straight objective-c view controller (named as a .m file) was including C++ header files the compiler was throwing spurious errors. There are two solutions. The quickest is to rename the view